diff --git a/docs/api/api.ipynb b/docs/api/api.ipynb
index e80f81cc..cd2d3dfa 100644
--- a/docs/api/api.ipynb
+++ b/docs/api/api.ipynb
@@ -206,7 +206,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": 13,
    "metadata": {},
    "outputs": [
     {
@@ -236,7 +236,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 11,
+   "execution_count": 14,
    "metadata": {},
    "outputs": [
     {
@@ -244,7 +244,7 @@
      "output_type": "stream",
      "text": [
       "{\n",
-      "  \"count\": 1,\n",
+      "  \"count\": 3,\n",
       "  \"next\": null,\n",
       "  \"previous\": null,\n",
       "  \"results\": [\n",
@@ -252,6 +252,16 @@
       "      \"id\": 1,\n",
       "      \"first_name\": \"Lucek\",\n",
       "      \"last_name\": \"Grzegorzewski\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"id\": 16,\n",
+      "      \"first_name\": \"Marika T\",\n",
+      "      \"last_name\": \"Granfors\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"id\": 42,\n",
+      "      \"first_name\": \"L\",\n",
+      "      \"last_name\": \"Granit\"\n",
       "    }\n",
       "  ]\n",
       "}\n"
@@ -260,7 +270,7 @@
    ],
    "source": [
     "# Search for author\n",
-    "data = client.action(document, [\"authors\", \"list\"], params={\"search\":\"Gr\"} )\n",
+    "data = client.action(document, [\"authors\", \"list\"], params={\"search\": \"Gr\"} )\n",
     "print(json.dumps(data, indent=2))"
    ]
   },
@@ -272,17 +282,36 @@
    },
    "outputs": [
     {
-     "ename": "ErrorMessage",
-     "evalue": "<Error: 500 Internal Server Error>\n    message: \"ProgrammingError at /api/v1/studies/\n              column studies_study.abstract does not exist\n              LINE 1: ... \\\"studies_study\\\".\\\"title\\\", \\\"studies_study\\\".\\\"pmid\\\", \\\"studies_s...\n                                                                           ^\n              \n              \n              Request Method: POST\n              Request URL: http://0.0.0.0:8000/api/v1/studies/\n              Django Version: 2.0.6\n              Python Executable: /usr/local/bin/python\n              Python Version: 3.6.6\n              Python Path: ['/code', '/usr/local/lib/python36.zip', '/usr/local/lib/python3.6', '/usr/local/lib/python3.6/lib-dynload', '/usr/local/lib/python3.6/site-packages']\n              Server time: Fri, 29 Jun 2018 14:19:48 +0000\n              Installed Applications:\n              ('django.contrib.admin',\n               'django.contrib.auth',\n               'django.contrib.contenttypes',\n               'django.contrib.sessions',\n               'django.contrib.messages',\n               'django.contrib.staticfiles',\n               'rest_framework',\n               'rest_framework.authtoken',\n               'django_filters',\n               'rest_framework_swagger',\n               'pkdb_app.users',\n               'pkdb_app.studies',\n               'pkdb_app.subjects',\n               'django_nose')\n              Installed Middleware:\n              ('django.middleware.security.SecurityMiddleware',\n               'django.contrib.sessions.middleware.SessionMiddleware',\n               'django.middleware.common.CommonMiddleware',\n               'django.middleware.csrf.CsrfViewMiddleware',\n               'django.contrib.auth.middleware.AuthenticationMiddleware',\n               'django.contrib.messages.middleware.MessageMiddleware',\n               'django.middleware.clickjacking.XFrameOptionsMiddleware')\n              \n              \n              Traceback:\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in _execute\n                85.                 return self.cursor.execute(sql, params)\n              \n              The above exception (column studies_study.abstract does not exist\n              LINE 1: ... \\\"studies_study\\\".\\\"title\\\", \\\"studies_study\\\".\\\"pmid\\\", \\\"studies_s...\n                                                                           ^\n              ) was the direct cause of the following exception:\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py\\\" in inner\n                35.             response = get_response(request)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py\\\" in _get_response\n                128.                 response = self.process_exception_by_middleware(e, request)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py\\\" in _get_response\n                126.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/views/decorators/csrf.py\\\" in wrapped_view\n                54.         return view_func(*args, **kwargs)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/viewsets.py\\\" in view\n                103.             return self.dispatch(request, *args, **kwargs)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/views.py\\\" in dispatch\n                483.             response = self.handle_exception(exc)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/views.py\\\" in handle_exception\n                443.             self.raise_uncaught_exception(exc)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/views.py\\\" in dispatch\n                480.             response = handler(request, *args, **kwargs)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/mixins.py\\\" in create\n                21.         self.perform_create(serializer)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/mixins.py\\\" in perform_create\n                26.         serializer.save()\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/serializers.py\\\" in save\n                214.             self.instance = self.create(validated_data)\n              \n              File \\\"/code/pkdb_app/studies/serializers.py\\\" in create\n                38.         study, _ = Study.objects.update_or_create(pmid=validated_data[\\\"pmid\\\"],defaults = validated_data)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/manager.py\\\" in manager_method\n                82.                 return getattr(self.get_queryset(), name)(*args, **kwargs)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/query.py\\\" in update_or_create\n                503.                 obj = self.select_for_update().get(**lookup)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/query.py\\\" in get\n                397.         num = len(clone)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/query.py\\\" in __len__\n                254.         self._fetch_all()\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/query.py\\\" in _fetch_all\n                1179.             self._result_cache = list(self._iterable_class(self))\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/query.py\\\" in __iter__\n                53.         results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/sql/compiler.py\\\" in execute_sql\n                1068.             cursor.execute(sql, params)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in execute\n                100.             return super().execute(sql, params)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in execute\n                68.         return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in _execute_with_wrappers\n                77.         return executor(sql, params, many, context)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in _execute\n                85.                 return self.cursor.execute(sql, params)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/utils.py\\\" in __exit__\n                89.                 raise dj_exc_value.with_traceback(traceback) from exc_value\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in _execute\n                85.                 return self.cursor.execute(sql, params)\n              \n              Exception Type: ProgrammingError at /api/v1/studies/\n              Exception Value: column studies_study.abstract does not exist\n              LINE 1: ... \\\"studies_study\\\".\\\"title\\\", \\\"studies_study\\\".\\\"pmid\\\", \\\"studies_s...\n                                                                           ^\n              \n              Request information:\n              USER: AnonymousUser\n              \n              GET: No GET data\n              \n              POST: No POST data\n              \n              FILES: No FILES data\n              \n              COOKIES: No cookie data\n              \n              META:\n              CONTENT_LENGTH = '313'\n              CONTENT_TYPE = 'application/json'\n              DJANGO_CONFIGURATION = 'Local'\n              DJANGO_SECRET_KEY = 'local'\n              DJANGO_SETTINGS_MODULE = 'pkdb_app.config'\n              GATEWAY_INTERFACE = 'CGI/1.1'\n              GPG_KEY = '0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D'\n              HOME = '/root'\n              HOSTNAME = '31d04f34d3ce'\n              HTTP_ACCEPT = 'application/coreapi+json, application/vnd.coreapi+json, */*'\n              HTTP_ACCEPT_ENCODING = 'gzip, deflate'\n              HTTP_CONNECTION = 'keep-alive'\n              HTTP_HOST = '0.0.0.0:8000'\n              HTTP_USER_AGENT = 'coreapi'\n              LANG = 'C.UTF-8'\n              PATH = '/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'\n              PATH_INFO = '/api/v1/studies/'\n              PWD = '/code'\n              PYTHONUNBUFFERED = '1'\n              PYTHON_PIP_VERSION = '10.0.1'\n              PYTHON_VERSION = '3.6.6'\n              QUERY_STRING = ''\n              REMOTE_ADDR = '172.18.0.1'\n              REMOTE_HOST = ''\n              REQUEST_METHOD = 'POST'\n              RUN_MAIN = 'true'\n              SCRIPT_NAME = ''\n              SERVER_NAME = '31d04f34d3ce'\n              SERVER_PORT = '8000'\n              SERVER_PROTOCOL = 'HTTP/1.1'\n              SERVER_SOFTWARE = 'WSGIServer/0.2'\n              SHLVL = '1'\n              TZ = 'UTC'\n              _ = './manage.py'\n              wsgi.errors = <_io.TextIOWrapper name='<stderr>' mode='w' encoding='UTF-8'>\n              wsgi.file_wrapper = ''\n              wsgi.input = <_io.BufferedReader name=5>\n              wsgi.multiprocess = False\n              wsgi.multithread = True\n              wsgi.run_once = False\n              wsgi.url_scheme = 'http'\n              wsgi.version = '(1, 0)'\n              \n              Settings:\n              Using settings module pkdb_app.config\n              ABSOLUTE_URL_OVERRIDES = {}\n              ADMINS = \\\"(('Author', 'janekg89@hotmail.de'),)\\\"\n              ALLOWED_HOSTS = ['*']\n              APPEND_SLASH = False\n              AUTHENTICATION_BACKENDS = ['django.contrib.auth.backends.ModelBackend']\n              AUTH_PASSWORD_VALIDATORS = '********************'\n              AUTH_USER_MODEL = 'users.User'\n              CACHES = {'default': {'BACKEND': 'django.core.cache.backends.locmem.LocMemCache'}}\n              CACHE_MIDDLEWARE_ALIAS = 'default'\n              CACHE_MIDDLEWARE_KEY_PREFIX = '********************'\n              CACHE_MIDDLEWARE_SECONDS = 600\n              CONFIGURATION = 'pkdb_app.config.Local'\n              CSRF_COOKIE_AGE = 31449600\n              CSRF_COOKIE_DOMAIN = None\n              CSRF_COOKIE_HTTPONLY = False\n              CSRF_COOKIE_NAME = 'csrftoken'\n              CSRF_COOKIE_PATH = '/'\n              CSRF_COOKIE_SECURE = False\n              CSRF_FAILURE_VIEW = 'django.views.csrf.csrf_failure'\n              CSRF_HEADER_NAME = 'HTTP_X_CSRFTOKEN'\n              CSRF_TRUSTED_ORIGINS = []\n              CSRF_USE_SESSIONS = False\n              DATABASES = {'default': {'NAME': 'postgres', 'USER': 'postgres', 'PASSWORD': '********************', 'HOST': 'postgres', 'PORT': 5432, 'CONN_MAX_AGE': 600, 'ENGINE': 'django.db.backends.postgresql_psycopg2', 'ATOMIC_REQUESTS': False, 'AUTOCOMMIT': True, 'OPTIONS': {}, 'TIME_ZONE': None, 'TEST': {'CHARSET': None, 'COLLATION': None, 'NAME': None, 'MIRROR': None}}}\n              DATABASE_ROUTERS = []\n              DATA_UPLOAD_MAX_MEMORY_SIZE = 2621440\n              DATA_UPLOAD_MAX_NUMBER_FIELDS = 1000\n              DATETIME_FORMAT = 'N j, Y, P'\n              DATETIME_INPUT_FORMATS = ['%Y-%m-%d %H:%M:%S', '%Y-%m-%d %H:%M:%S.%f', '%Y-%m-%d %H:%M', '%Y-%m-%d', '%m/%d/%Y %H:%M:%S', '%m/%d/%Y %H:%M:%S.%f', '%m/%d/%Y %H:%M', '%m/%d/%Y', '%m/%d/%y %H:%M:%S', '%m/%d/%y %H:%M:%S.%f', '%m/%d/%y %H:%M', '%m/%d/%y']\n              DATE_FORMAT = 'N j, Y'\n              DATE_INPUT_FORMATS = ['%Y-%m-%d', '%m/%d/%Y', '%m/%d/%y', '%b %d %Y', '%b %d, %Y', '%d %b %Y', '%d %b, %Y', '%B %d %Y', '%B %d, %Y', '%d %B %Y', '%d %B, %Y']\n              DEBUG = True\n              DEBUG_PROPAGATE_EXCEPTIONS = False\n              DECIMAL_SEPARATOR = '.'\n              DEFAULT_CHARSET = 'utf-8'\n              DEFAULT_CONTENT_TYPE = 'text/html'\n              DEFAULT_EXCEPTION_REPORTER_FILTER = 'django.views.debug.SafeExceptionReporterFilter'\n              DEFAULT_FILE_STORAGE = 'django.core.files.storage.FileSystemStorage'\n              DEFAULT_FROM_EMAIL = 'webmaster@localhost'\n              DEFAULT_INDEX_TABLESPACE = ''\n              DEFAULT_TABLESPACE = ''\n              DISALLOWED_USER_AGENTS = []\n              DOTENV_LOADED = None\n              EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'\n              EMAIL_HOST = 'localhost'\n              EMAIL_HOST_PASSWORD = '********************'\n              EMAIL_HOST_USER = ''\n              EMAIL_PORT = 1025\n              EMAIL_SSL_CERTFILE = None\n              EMAIL_SSL_KEYFILE = '********************'\n              EMAIL_SUBJECT_PREFIX = '[Django] '\n              EMAIL_TIMEOUT = None\n              EMAIL_USE_LOCALTIME = False\n              EMAIL_USE_SSL = False\n              EMAIL_USE_TLS = False\n              FILE_CHARSET = 'utf-8'\n              FILE_UPLOAD_DIRECTORY_PERMISSIONS = None\n              FILE_UPLOAD_HANDLERS = ['django.core.files.uploadhandler.MemoryFileUploadHandler', 'django.core.files.uploadhandler.TemporaryFileUploadHandler']\n              FILE_UPLOAD_MAX_MEMORY_SIZE = 2621440\n              FILE_UPLOAD_PERMISSIONS = None\n              FILE_UPLOAD_TEMP_DIR = None\n              FIRST_DAY_OF_WEEK = 0\n              FIXTURE_DIRS = []\n              FORCE_SCRIPT_NAME = None\n              FORMAT_MODULE_PATH = None\n              FORM_RENDERER = 'django.forms.renderers.DjangoTemplates'\n              IGNORABLE_404_URLS = []\n              INSTALLED_APPS = \\\"('django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'rest_framework', 'rest_framework.authtoken', 'django_filters', 'rest_framework_swagger', 'pkdb_app.users', 'pkdb_app.studies', 'pkdb_app.subjects', 'django_nose')\\\"\n              INTERNAL_IPS = []\n              LANGUAGES = [('af', 'Afrikaans'), ('ar', 'Arabic'), ('ast', 'Asturian'), ('az', 'Azerbaijani'), ('bg', 'Bulgarian'), ('be', 'Belarusian'), ('bn', 'Bengali'), ('br', 'Breton'), ('bs', 'Bosnian'), ('ca', 'Catalan'), ('cs', 'Czech'), ('cy', 'Welsh'), ('da', 'Danish'), ('de', 'German'), ('dsb', 'Lower Sorbian'), ('el', 'Greek'), ('en', 'English'), ('en-au', 'Australian English'), ('en-gb', 'British English'), ('eo', 'Esperanto'), ('es', 'Spanish'), ('es-ar', 'Argentinian Spanish'), ('es-co', 'Colombian Spanish'), ('es-mx', 'Mexican Spanish'), ('es-ni', 'Nicaraguan Spanish'), ('es-ve', 'Venezuelan Spanish'), ('et', 'Estonian'), ('eu', 'Basque'), ('fa', 'Persian'), ('fi', 'Finnish'), ('fr', 'French'), ('fy', 'Frisian'), ('ga', 'Irish'), ('gd', 'Scottish Gaelic'), ('gl', 'Galician'), ('he', 'Hebrew'), ('hi', 'Hindi'), ('hr', 'Croatian'), ('hsb', 'Upper Sorbian'), ('hu', 'Hungarian'), ('ia', 'Interlingua'), ('id', 'Indonesian'), ('io', 'Ido'), ('is', 'Icelandic'), ('it', 'Italian'), ('ja', 'Japanese'), ('ka', 'Georgian'), ('kab', 'Kabyle'), ('kk', 'Kazakh'), ('km', 'Khmer'), ('kn', 'Kannada'), ('ko', 'Korean'), ('lb', 'Luxembourgish'), ('lt', 'Lithuanian'), ('lv', 'Latvian'), ('mk', 'Macedonian'), ('ml', 'Malayalam'), ('mn', 'Mongolian'), ('mr', 'Marathi'), ('my', 'Burmese'), ('nb', 'Norwegian Bokm\\u00e5l'), ('ne', 'Nepali'), ('nl', 'Dutch'), ('nn', 'Norwegian Nynorsk'), ('os', 'Ossetic'), ('pa', 'Punjabi'), ('pl', 'Polish'), ('pt', 'Portuguese'), ('pt-br', 'Brazilian Portuguese'), ('ro', 'Romanian'), ('ru', 'Russian'), ('sk', 'Slovak'), ('sl', 'Slovenian'), ('sq', 'Albanian'), ('sr', 'Serbian'), ('sr-latn', 'Serbian Latin'), ('sv', 'Swedish'), ('sw', 'Swahili'), ('ta', 'Tamil'), ('te', 'Telugu'), ('th', 'Thai'), ('tr', 'Turkish'), ('tt', 'Tatar'), ('udm', 'Udmurt'), ('uk', 'Ukrainian'), ('ur', 'Urdu'), ('vi', 'Vietnamese'), ('zh-hans', 'Simplified Chinese'), ('zh-hant', 'Traditional Chinese')]\n              LANGUAGES_BIDI = ['he', 'ar', 'fa', 'ur']\n              LANGUAGE_CODE = 'en-us'\n              LANGUAGE_COOKIE_AGE = None\n              LANGUAGE_COOKIE_DOMAIN = None\n              LANGUAGE_COOKIE_NAME = 'django_language'\n              LANGUAGE_COOKIE_PATH = '/'\n              LOCALE_PATHS = []\n              LOGGING = {'version': 1, 'disable_existing_loggers': False, 'formatters': {'django.server': {'()': 'django.utils.log.ServerFormatter', 'format': '[%(server_time)s] %(message)s'}, 'verbose': {'format': '%(levelname)s %(asctime)s %(module)s %(process)d %(thread)d %(message)s'}, 'simple': {'format': '%(levelname)s %(message)s'}}, 'filters': {'require_debug_true': {'()': 'django.utils.log.RequireDebugTrue'}}, 'handlers': {'django.server': {'level': 'INFO', 'class': 'logging.StreamHandler', 'formatter': 'django.server'}, 'console': {'level': 'DEBUG', 'class': 'logging.StreamHandler', 'formatter': 'simple'}, 'mail_admins': {'level': 'ERROR', 'class': 'django.utils.log.AdminEmailHandler'}}, 'loggers': {'django': {'handlers': ['console'], 'propagate': True}, 'django.server': {'handlers': ['django.server'], 'level': 'INFO', 'propagate': False}, 'django.request': {'handlers': ['mail_admins', 'console'], 'level': 'ERROR', 'propagate': False}, 'django.db.backends': {'handlers': ['console'], 'level': 'INFO'}}}\n              LOGGING_CONFIG = 'logging.config.dictConfig'\n              LOGIN_REDIRECT_URL = '/'\n              LOGIN_URL = 'rest_framework:login'\n              LOGOUT_REDIRECT_URL = None\n              LOGOUT_URL = 'rest_framework:logout'\n              MANAGERS = []\n              MEDIA_ROOT = '/code/media'\n              MEDIA_URL = '/media/'\n              MESSAGE_STORAGE = 'django.contrib.messages.storage.fallback.FallbackStorage'\n              MIDDLEWARE = \\\"('django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware')\\\"\n              MIGRATION_MODULES = {}\n              MONTH_DAY_FORMAT = 'F j'\n              NOSE_ARGS = ['/code/pkdb_app', '-s', '--nologcapture', '--with-coverage', '--with-progressive', '--cover-package=pkdb']\n              NUMBER_GROUPING = 0\n              PASSWORD_HASHERS = '********************'\n              PASSWORD_RESET_TIMEOUT_DAYS = '********************'\n              PREPEND_WWW = False\n              REST_FRAMEWORK = {'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination', 'PAGE_SIZE': 10, 'DATETIME_FORMAT': '%Y-%m-%dT%H:%M:%S%z', 'DEFAULT_RENDERER_CLASSES': ('rest_framework.renderers.JSONRenderer', 'rest_framework.renderers.BrowsableAPIRenderer'), 'DEFAULT_PERMISSION_CLASSES': ['rest_framework.permissions.AllowAny'], 'DEFAULT_AUTHENTICATION_CLASSES': ('rest_framework.authentication.SessionAuthentication',), 'DEFAULT_FILTER_BACKENDS': ('django_filters.rest_framework.DjangoFilterBackend',)}\n              ROOT_URLCONF = 'pkdb_app.urls'\n              SECRET_KEY = '********************'\n              SECURE_BROWSER_XSS_FILTER = False\n              SECURE_CONTENT_TYPE_NOSNIFF = False\n              SECURE_HSTS_INCLUDE_SUBDOMAINS = False\n              SECURE_HSTS_PRELOAD = False\n              SECURE_HSTS_SECONDS = 0\n              SECURE_PROXY_SSL_HEADER = None\n              SECURE_REDIRECT_EXEMPT = []\n              SECURE_SSL_HOST = None\n              SECURE_SSL_REDIRECT = False\n              SERVER_EMAIL = 'root@localhost'\n              SESSION_CACHE_ALIAS = 'default'\n              SESSION_COOKIE_AGE = 1209600\n              SESSION_COOKIE_DOMAIN = None\n              SESSION_COOKIE_HTTPONLY = True\n              SESSION_COOKIE_NAME = 'sessionid'\n              SESSION_COOKIE_PATH = '/'\n              SESSION_COOKIE_SECURE = False\n              SESSION_ENGINE = 'django.contrib.sessions.backends.db'\n              SESSION_EXPIRE_AT_BROWSER_CLOSE = False\n              SESSION_FILE_PATH = None\n              SESSION_SAVE_EVERY_REQUEST = False\n              SESSION_SERIALIZER = 'django.contrib.sessions.serializers.JSONSerializer'\n              SETTINGS_MODULE = 'pkdb_app.config'\n              SHORT_DATETIME_FORMAT = 'm/d/Y P'\n              SHORT_DATE_FORMAT = 'm/d/Y'\n              SIGNING_BACKEND = 'django.core.signing.TimestampSigner'\n              SILENCED_SYSTEM_CHECKS = []\n              STATICFILES_DIRS = []\n              STATICFILES_FINDERS = \\\"('django.contrib.staticfiles.finders.FileSystemFinder', 'django.contrib.staticfiles.finders.AppDirectoriesFinder')\\\"\n              STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.StaticFilesStorage'\n              STATIC_ROOT = '/code/static'\n              STATIC_URL = '/static/'\n              SWAGGER_SETTINGS = {'LOGIN_URL': 'rest_framework:login', 'LOGOUT_URL': 'rest_framework:logout', 'USE_SESSION_AUTH': True, 'DOC_EXPANSION': 'list', 'APIS_SORTER': '********************', 'SECURITY_DEFINITIONS': {'basic': {'type': 'basic'}}}\n              TEMPLATES = [{'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': [], 'APP_DIRS': True, 'OPTIONS': {'context_processors': ['django.template.context_processors.debug', 'django.template.context_processors.request', 'django.contrib.auth.context_processors.auth', 'django.contrib.messages.context_processors.messages']}}]\n              TEST_NON_SERIALIZED_APPS = []\n              TEST_RUNNER = 'django_nose.NoseTestSuiteRunner'\n              THOUSAND_SEPARATOR = ','\n              TIME_FORMAT = 'P'\n              TIME_INPUT_FORMATS = ['%H:%M:%S', '%H:%M:%S.%f', '%H:%M']\n              TIME_ZONE = 'UTC'\n              USE_ETAGS = False\n              USE_I18N = False\n              USE_L10N = True\n              USE_THOUSAND_SEPARATOR = False\n              USE_TZ = True\n              USE_X_FORWARDED_HOST = False\n              USE_X_FORWARDED_PORT = False\n              WSGI_APPLICATION = 'pkdb_app.wsgi.application'\n              X_FRAME_OPTIONS = 'SAMEORIGIN'\n              YEAR_MONTH_FORMAT = 'F Y'\n              \n              \n              You're seeing this error because you have DEBUG = True in your\n              Django settings file. Change that to False, and Django will\n              display a standard page generated by the handler for this status code.\n              \n              \"",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[0;31mErrorMessage\u001b[0m                              Traceback (most recent call last)",
-      "\u001b[0;32m<ipython-input-12-dafbacba64d8>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[1;32m     12\u001b[0m     ]\n\u001b[1;32m     13\u001b[0m }\n\u001b[0;32m---> 14\u001b[0;31m \u001b[0mclient\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0maction\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mdocument\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m\"studies\"\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m\"create\"\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mparams\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mstudy_dict\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-      "\u001b[0;32m~/envs/pkdb/lib/python3.6/site-packages/coreapi/client.py\u001b[0m in \u001b[0;36maction\u001b[0;34m(self, document, keys, params, validate, overrides, action, encoding, transform)\u001b[0m\n\u001b[1;32m    176\u001b[0m         \u001b[0;31m# Perform the action, and return a new document.\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    177\u001b[0m         \u001b[0mtransport\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mdetermine_transport\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mtransports\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mlink\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0murl\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 178\u001b[0;31m         \u001b[0;32mreturn\u001b[0m \u001b[0mtransport\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mtransition\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mlink\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mdecoders\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mparams\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mparams\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mlink_ancestors\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mlink_ancestors\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-      "\u001b[0;32m~/envs/pkdb/lib/python3.6/site-packages/coreapi/transports/http.py\u001b[0m in \u001b[0;36mtransition\u001b[0;34m(self, link, decoders, params, link_ancestors, force_codec)\u001b[0m\n\u001b[1;32m    384\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    385\u001b[0m         \u001b[0;32mif\u001b[0m \u001b[0misinstance\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mresult\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mError\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 386\u001b[0;31m             \u001b[0;32mraise\u001b[0m \u001b[0mexceptions\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mErrorMessage\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mresult\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    387\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    388\u001b[0m         \u001b[0;32mreturn\u001b[0m \u001b[0mresult\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;31mErrorMessage\u001b[0m: <Error: 500 Internal Server Error>\n    message: \"ProgrammingError at /api/v1/studies/\n              column studies_study.abstract does not exist\n              LINE 1: ... \\\"studies_study\\\".\\\"title\\\", \\\"studies_study\\\".\\\"pmid\\\", \\\"studies_s...\n                                                                           ^\n              \n              \n              Request Method: POST\n              Request URL: http://0.0.0.0:8000/api/v1/studies/\n              Django Version: 2.0.6\n              Python Executable: /usr/local/bin/python\n              Python Version: 3.6.6\n              Python Path: ['/code', '/usr/local/lib/python36.zip', '/usr/local/lib/python3.6', '/usr/local/lib/python3.6/lib-dynload', '/usr/local/lib/python3.6/site-packages']\n              Server time: Fri, 29 Jun 2018 14:19:48 +0000\n              Installed Applications:\n              ('django.contrib.admin',\n               'django.contrib.auth',\n               'django.contrib.contenttypes',\n               'django.contrib.sessions',\n               'django.contrib.messages',\n               'django.contrib.staticfiles',\n               'rest_framework',\n               'rest_framework.authtoken',\n               'django_filters',\n               'rest_framework_swagger',\n               'pkdb_app.users',\n               'pkdb_app.studies',\n               'pkdb_app.subjects',\n               'django_nose')\n              Installed Middleware:\n              ('django.middleware.security.SecurityMiddleware',\n               'django.contrib.sessions.middleware.SessionMiddleware',\n               'django.middleware.common.CommonMiddleware',\n               'django.middleware.csrf.CsrfViewMiddleware',\n               'django.contrib.auth.middleware.AuthenticationMiddleware',\n               'django.contrib.messages.middleware.MessageMiddleware',\n               'django.middleware.clickjacking.XFrameOptionsMiddleware')\n              \n              \n              Traceback:\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in _execute\n                85.                 return self.cursor.execute(sql, params)\n              \n              The above exception (column studies_study.abstract does not exist\n              LINE 1: ... \\\"studies_study\\\".\\\"title\\\", \\\"studies_study\\\".\\\"pmid\\\", \\\"studies_s...\n                                                                           ^\n              ) was the direct cause of the following exception:\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py\\\" in inner\n                35.             response = get_response(request)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py\\\" in _get_response\n                128.                 response = self.process_exception_by_middleware(e, request)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py\\\" in _get_response\n                126.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/views/decorators/csrf.py\\\" in wrapped_view\n                54.         return view_func(*args, **kwargs)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/viewsets.py\\\" in view\n                103.             return self.dispatch(request, *args, **kwargs)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/views.py\\\" in dispatch\n                483.             response = self.handle_exception(exc)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/views.py\\\" in handle_exception\n                443.             self.raise_uncaught_exception(exc)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/views.py\\\" in dispatch\n                480.             response = handler(request, *args, **kwargs)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/mixins.py\\\" in create\n                21.         self.perform_create(serializer)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/mixins.py\\\" in perform_create\n                26.         serializer.save()\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/rest_framework/serializers.py\\\" in save\n                214.             self.instance = self.create(validated_data)\n              \n              File \\\"/code/pkdb_app/studies/serializers.py\\\" in create\n                38.         study, _ = Study.objects.update_or_create(pmid=validated_data[\\\"pmid\\\"],defaults = validated_data)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/manager.py\\\" in manager_method\n                82.                 return getattr(self.get_queryset(), name)(*args, **kwargs)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/query.py\\\" in update_or_create\n                503.                 obj = self.select_for_update().get(**lookup)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/query.py\\\" in get\n                397.         num = len(clone)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/query.py\\\" in __len__\n                254.         self._fetch_all()\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/query.py\\\" in _fetch_all\n                1179.             self._result_cache = list(self._iterable_class(self))\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/query.py\\\" in __iter__\n                53.         results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/models/sql/compiler.py\\\" in execute_sql\n                1068.             cursor.execute(sql, params)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in execute\n                100.             return super().execute(sql, params)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in execute\n                68.         return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in _execute_with_wrappers\n                77.         return executor(sql, params, many, context)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in _execute\n                85.                 return self.cursor.execute(sql, params)\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/utils.py\\\" in __exit__\n                89.                 raise dj_exc_value.with_traceback(traceback) from exc_value\n              \n              File \\\"/usr/local/lib/python3.6/site-packages/django/db/backends/utils.py\\\" in _execute\n                85.                 return self.cursor.execute(sql, params)\n              \n              Exception Type: ProgrammingError at /api/v1/studies/\n              Exception Value: column studies_study.abstract does not exist\n              LINE 1: ... \\\"studies_study\\\".\\\"title\\\", \\\"studies_study\\\".\\\"pmid\\\", \\\"studies_s...\n                                                                           ^\n              \n              Request information:\n              USER: AnonymousUser\n              \n              GET: No GET data\n              \n              POST: No POST data\n              \n              FILES: No FILES data\n              \n              COOKIES: No cookie data\n              \n              META:\n              CONTENT_LENGTH = '313'\n              CONTENT_TYPE = 'application/json'\n              DJANGO_CONFIGURATION = 'Local'\n              DJANGO_SECRET_KEY = 'local'\n              DJANGO_SETTINGS_MODULE = 'pkdb_app.config'\n              GATEWAY_INTERFACE = 'CGI/1.1'\n              GPG_KEY = '0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D'\n              HOME = '/root'\n              HOSTNAME = '31d04f34d3ce'\n              HTTP_ACCEPT = 'application/coreapi+json, application/vnd.coreapi+json, */*'\n              HTTP_ACCEPT_ENCODING = 'gzip, deflate'\n              HTTP_CONNECTION = 'keep-alive'\n              HTTP_HOST = '0.0.0.0:8000'\n              HTTP_USER_AGENT = 'coreapi'\n              LANG = 'C.UTF-8'\n              PATH = '/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'\n              PATH_INFO = '/api/v1/studies/'\n              PWD = '/code'\n              PYTHONUNBUFFERED = '1'\n              PYTHON_PIP_VERSION = '10.0.1'\n              PYTHON_VERSION = '3.6.6'\n              QUERY_STRING = ''\n              REMOTE_ADDR = '172.18.0.1'\n              REMOTE_HOST = ''\n              REQUEST_METHOD = 'POST'\n              RUN_MAIN = 'true'\n              SCRIPT_NAME = ''\n              SERVER_NAME = '31d04f34d3ce'\n              SERVER_PORT = '8000'\n              SERVER_PROTOCOL = 'HTTP/1.1'\n              SERVER_SOFTWARE = 'WSGIServer/0.2'\n              SHLVL = '1'\n              TZ = 'UTC'\n              _ = './manage.py'\n              wsgi.errors = <_io.TextIOWrapper name='<stderr>' mode='w' encoding='UTF-8'>\n              wsgi.file_wrapper = ''\n              wsgi.input = <_io.BufferedReader name=5>\n              wsgi.multiprocess = False\n              wsgi.multithread = True\n              wsgi.run_once = False\n              wsgi.url_scheme = 'http'\n              wsgi.version = '(1, 0)'\n              \n              Settings:\n              Using settings module pkdb_app.config\n              ABSOLUTE_URL_OVERRIDES = {}\n              ADMINS = \\\"(('Author', 'janekg89@hotmail.de'),)\\\"\n              ALLOWED_HOSTS = ['*']\n              APPEND_SLASH = False\n              AUTHENTICATION_BACKENDS = ['django.contrib.auth.backends.ModelBackend']\n              AUTH_PASSWORD_VALIDATORS = '********************'\n              AUTH_USER_MODEL = 'users.User'\n              CACHES = {'default': {'BACKEND': 'django.core.cache.backends.locmem.LocMemCache'}}\n              CACHE_MIDDLEWARE_ALIAS = 'default'\n              CACHE_MIDDLEWARE_KEY_PREFIX = '********************'\n              CACHE_MIDDLEWARE_SECONDS = 600\n              CONFIGURATION = 'pkdb_app.config.Local'\n              CSRF_COOKIE_AGE = 31449600\n              CSRF_COOKIE_DOMAIN = None\n              CSRF_COOKIE_HTTPONLY = False\n              CSRF_COOKIE_NAME = 'csrftoken'\n              CSRF_COOKIE_PATH = '/'\n              CSRF_COOKIE_SECURE = False\n              CSRF_FAILURE_VIEW = 'django.views.csrf.csrf_failure'\n              CSRF_HEADER_NAME = 'HTTP_X_CSRFTOKEN'\n              CSRF_TRUSTED_ORIGINS = []\n              CSRF_USE_SESSIONS = False\n              DATABASES = {'default': {'NAME': 'postgres', 'USER': 'postgres', 'PASSWORD': '********************', 'HOST': 'postgres', 'PORT': 5432, 'CONN_MAX_AGE': 600, 'ENGINE': 'django.db.backends.postgresql_psycopg2', 'ATOMIC_REQUESTS': False, 'AUTOCOMMIT': True, 'OPTIONS': {}, 'TIME_ZONE': None, 'TEST': {'CHARSET': None, 'COLLATION': None, 'NAME': None, 'MIRROR': None}}}\n              DATABASE_ROUTERS = []\n              DATA_UPLOAD_MAX_MEMORY_SIZE = 2621440\n              DATA_UPLOAD_MAX_NUMBER_FIELDS = 1000\n              DATETIME_FORMAT = 'N j, Y, P'\n              DATETIME_INPUT_FORMATS = ['%Y-%m-%d %H:%M:%S', '%Y-%m-%d %H:%M:%S.%f', '%Y-%m-%d %H:%M', '%Y-%m-%d', '%m/%d/%Y %H:%M:%S', '%m/%d/%Y %H:%M:%S.%f', '%m/%d/%Y %H:%M', '%m/%d/%Y', '%m/%d/%y %H:%M:%S', '%m/%d/%y %H:%M:%S.%f', '%m/%d/%y %H:%M', '%m/%d/%y']\n              DATE_FORMAT = 'N j, Y'\n              DATE_INPUT_FORMATS = ['%Y-%m-%d', '%m/%d/%Y', '%m/%d/%y', '%b %d %Y', '%b %d, %Y', '%d %b %Y', '%d %b, %Y', '%B %d %Y', '%B %d, %Y', '%d %B %Y', '%d %B, %Y']\n              DEBUG = True\n              DEBUG_PROPAGATE_EXCEPTIONS = False\n              DECIMAL_SEPARATOR = '.'\n              DEFAULT_CHARSET = 'utf-8'\n              DEFAULT_CONTENT_TYPE = 'text/html'\n              DEFAULT_EXCEPTION_REPORTER_FILTER = 'django.views.debug.SafeExceptionReporterFilter'\n              DEFAULT_FILE_STORAGE = 'django.core.files.storage.FileSystemStorage'\n              DEFAULT_FROM_EMAIL = 'webmaster@localhost'\n              DEFAULT_INDEX_TABLESPACE = ''\n              DEFAULT_TABLESPACE = ''\n              DISALLOWED_USER_AGENTS = []\n              DOTENV_LOADED = None\n              EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'\n              EMAIL_HOST = 'localhost'\n              EMAIL_HOST_PASSWORD = '********************'\n              EMAIL_HOST_USER = ''\n              EMAIL_PORT = 1025\n              EMAIL_SSL_CERTFILE = None\n              EMAIL_SSL_KEYFILE = '********************'\n              EMAIL_SUBJECT_PREFIX = '[Django] '\n              EMAIL_TIMEOUT = None\n              EMAIL_USE_LOCALTIME = False\n              EMAIL_USE_SSL = False\n              EMAIL_USE_TLS = False\n              FILE_CHARSET = 'utf-8'\n              FILE_UPLOAD_DIRECTORY_PERMISSIONS = None\n              FILE_UPLOAD_HANDLERS = ['django.core.files.uploadhandler.MemoryFileUploadHandler', 'django.core.files.uploadhandler.TemporaryFileUploadHandler']\n              FILE_UPLOAD_MAX_MEMORY_SIZE = 2621440\n              FILE_UPLOAD_PERMISSIONS = None\n              FILE_UPLOAD_TEMP_DIR = None\n              FIRST_DAY_OF_WEEK = 0\n              FIXTURE_DIRS = []\n              FORCE_SCRIPT_NAME = None\n              FORMAT_MODULE_PATH = None\n              FORM_RENDERER = 'django.forms.renderers.DjangoTemplates'\n              IGNORABLE_404_URLS = []\n              INSTALLED_APPS = \\\"('django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'rest_framework', 'rest_framework.authtoken', 'django_filters', 'rest_framework_swagger', 'pkdb_app.users', 'pkdb_app.studies', 'pkdb_app.subjects', 'django_nose')\\\"\n              INTERNAL_IPS = []\n              LANGUAGES = [('af', 'Afrikaans'), ('ar', 'Arabic'), ('ast', 'Asturian'), ('az', 'Azerbaijani'), ('bg', 'Bulgarian'), ('be', 'Belarusian'), ('bn', 'Bengali'), ('br', 'Breton'), ('bs', 'Bosnian'), ('ca', 'Catalan'), ('cs', 'Czech'), ('cy', 'Welsh'), ('da', 'Danish'), ('de', 'German'), ('dsb', 'Lower Sorbian'), ('el', 'Greek'), ('en', 'English'), ('en-au', 'Australian English'), ('en-gb', 'British English'), ('eo', 'Esperanto'), ('es', 'Spanish'), ('es-ar', 'Argentinian Spanish'), ('es-co', 'Colombian Spanish'), ('es-mx', 'Mexican Spanish'), ('es-ni', 'Nicaraguan Spanish'), ('es-ve', 'Venezuelan Spanish'), ('et', 'Estonian'), ('eu', 'Basque'), ('fa', 'Persian'), ('fi', 'Finnish'), ('fr', 'French'), ('fy', 'Frisian'), ('ga', 'Irish'), ('gd', 'Scottish Gaelic'), ('gl', 'Galician'), ('he', 'Hebrew'), ('hi', 'Hindi'), ('hr', 'Croatian'), ('hsb', 'Upper Sorbian'), ('hu', 'Hungarian'), ('ia', 'Interlingua'), ('id', 'Indonesian'), ('io', 'Ido'), ('is', 'Icelandic'), ('it', 'Italian'), ('ja', 'Japanese'), ('ka', 'Georgian'), ('kab', 'Kabyle'), ('kk', 'Kazakh'), ('km', 'Khmer'), ('kn', 'Kannada'), ('ko', 'Korean'), ('lb', 'Luxembourgish'), ('lt', 'Lithuanian'), ('lv', 'Latvian'), ('mk', 'Macedonian'), ('ml', 'Malayalam'), ('mn', 'Mongolian'), ('mr', 'Marathi'), ('my', 'Burmese'), ('nb', 'Norwegian Bokm\\u00e5l'), ('ne', 'Nepali'), ('nl', 'Dutch'), ('nn', 'Norwegian Nynorsk'), ('os', 'Ossetic'), ('pa', 'Punjabi'), ('pl', 'Polish'), ('pt', 'Portuguese'), ('pt-br', 'Brazilian Portuguese'), ('ro', 'Romanian'), ('ru', 'Russian'), ('sk', 'Slovak'), ('sl', 'Slovenian'), ('sq', 'Albanian'), ('sr', 'Serbian'), ('sr-latn', 'Serbian Latin'), ('sv', 'Swedish'), ('sw', 'Swahili'), ('ta', 'Tamil'), ('te', 'Telugu'), ('th', 'Thai'), ('tr', 'Turkish'), ('tt', 'Tatar'), ('udm', 'Udmurt'), ('uk', 'Ukrainian'), ('ur', 'Urdu'), ('vi', 'Vietnamese'), ('zh-hans', 'Simplified Chinese'), ('zh-hant', 'Traditional Chinese')]\n              LANGUAGES_BIDI = ['he', 'ar', 'fa', 'ur']\n              LANGUAGE_CODE = 'en-us'\n              LANGUAGE_COOKIE_AGE = None\n              LANGUAGE_COOKIE_DOMAIN = None\n              LANGUAGE_COOKIE_NAME = 'django_language'\n              LANGUAGE_COOKIE_PATH = '/'\n              LOCALE_PATHS = []\n              LOGGING = {'version': 1, 'disable_existing_loggers': False, 'formatters': {'django.server': {'()': 'django.utils.log.ServerFormatter', 'format': '[%(server_time)s] %(message)s'}, 'verbose': {'format': '%(levelname)s %(asctime)s %(module)s %(process)d %(thread)d %(message)s'}, 'simple': {'format': '%(levelname)s %(message)s'}}, 'filters': {'require_debug_true': {'()': 'django.utils.log.RequireDebugTrue'}}, 'handlers': {'django.server': {'level': 'INFO', 'class': 'logging.StreamHandler', 'formatter': 'django.server'}, 'console': {'level': 'DEBUG', 'class': 'logging.StreamHandler', 'formatter': 'simple'}, 'mail_admins': {'level': 'ERROR', 'class': 'django.utils.log.AdminEmailHandler'}}, 'loggers': {'django': {'handlers': ['console'], 'propagate': True}, 'django.server': {'handlers': ['django.server'], 'level': 'INFO', 'propagate': False}, 'django.request': {'handlers': ['mail_admins', 'console'], 'level': 'ERROR', 'propagate': False}, 'django.db.backends': {'handlers': ['console'], 'level': 'INFO'}}}\n              LOGGING_CONFIG = 'logging.config.dictConfig'\n              LOGIN_REDIRECT_URL = '/'\n              LOGIN_URL = 'rest_framework:login'\n              LOGOUT_REDIRECT_URL = None\n              LOGOUT_URL = 'rest_framework:logout'\n              MANAGERS = []\n              MEDIA_ROOT = '/code/media'\n              MEDIA_URL = '/media/'\n              MESSAGE_STORAGE = 'django.contrib.messages.storage.fallback.FallbackStorage'\n              MIDDLEWARE = \\\"('django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware')\\\"\n              MIGRATION_MODULES = {}\n              MONTH_DAY_FORMAT = 'F j'\n              NOSE_ARGS = ['/code/pkdb_app', '-s', '--nologcapture', '--with-coverage', '--with-progressive', '--cover-package=pkdb']\n              NUMBER_GROUPING = 0\n              PASSWORD_HASHERS = '********************'\n              PASSWORD_RESET_TIMEOUT_DAYS = '********************'\n              PREPEND_WWW = False\n              REST_FRAMEWORK = {'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination', 'PAGE_SIZE': 10, 'DATETIME_FORMAT': '%Y-%m-%dT%H:%M:%S%z', 'DEFAULT_RENDERER_CLASSES': ('rest_framework.renderers.JSONRenderer', 'rest_framework.renderers.BrowsableAPIRenderer'), 'DEFAULT_PERMISSION_CLASSES': ['rest_framework.permissions.AllowAny'], 'DEFAULT_AUTHENTICATION_CLASSES': ('rest_framework.authentication.SessionAuthentication',), 'DEFAULT_FILTER_BACKENDS': ('django_filters.rest_framework.DjangoFilterBackend',)}\n              ROOT_URLCONF = 'pkdb_app.urls'\n              SECRET_KEY = '********************'\n              SECURE_BROWSER_XSS_FILTER = False\n              SECURE_CONTENT_TYPE_NOSNIFF = False\n              SECURE_HSTS_INCLUDE_SUBDOMAINS = False\n              SECURE_HSTS_PRELOAD = False\n              SECURE_HSTS_SECONDS = 0\n              SECURE_PROXY_SSL_HEADER = None\n              SECURE_REDIRECT_EXEMPT = []\n              SECURE_SSL_HOST = None\n              SECURE_SSL_REDIRECT = False\n              SERVER_EMAIL = 'root@localhost'\n              SESSION_CACHE_ALIAS = 'default'\n              SESSION_COOKIE_AGE = 1209600\n              SESSION_COOKIE_DOMAIN = None\n              SESSION_COOKIE_HTTPONLY = True\n              SESSION_COOKIE_NAME = 'sessionid'\n              SESSION_COOKIE_PATH = '/'\n              SESSION_COOKIE_SECURE = False\n              SESSION_ENGINE = 'django.contrib.sessions.backends.db'\n              SESSION_EXPIRE_AT_BROWSER_CLOSE = False\n              SESSION_FILE_PATH = None\n              SESSION_SAVE_EVERY_REQUEST = False\n              SESSION_SERIALIZER = 'django.contrib.sessions.serializers.JSONSerializer'\n              SETTINGS_MODULE = 'pkdb_app.config'\n              SHORT_DATETIME_FORMAT = 'm/d/Y P'\n              SHORT_DATE_FORMAT = 'm/d/Y'\n              SIGNING_BACKEND = 'django.core.signing.TimestampSigner'\n              SILENCED_SYSTEM_CHECKS = []\n              STATICFILES_DIRS = []\n              STATICFILES_FINDERS = \\\"('django.contrib.staticfiles.finders.FileSystemFinder', 'django.contrib.staticfiles.finders.AppDirectoriesFinder')\\\"\n              STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.StaticFilesStorage'\n              STATIC_ROOT = '/code/static'\n              STATIC_URL = '/static/'\n              SWAGGER_SETTINGS = {'LOGIN_URL': 'rest_framework:login', 'LOGOUT_URL': 'rest_framework:logout', 'USE_SESSION_AUTH': True, 'DOC_EXPANSION': 'list', 'APIS_SORTER': '********************', 'SECURITY_DEFINITIONS': {'basic': {'type': 'basic'}}}\n              TEMPLATES = [{'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': [], 'APP_DIRS': True, 'OPTIONS': {'context_processors': ['django.template.context_processors.debug', 'django.template.context_processors.request', 'django.contrib.auth.context_processors.auth', 'django.contrib.messages.context_processors.messages']}}]\n              TEST_NON_SERIALIZED_APPS = []\n              TEST_RUNNER = 'django_nose.NoseTestSuiteRunner'\n              THOUSAND_SEPARATOR = ','\n              TIME_FORMAT = 'P'\n              TIME_INPUT_FORMATS = ['%H:%M:%S', '%H:%M:%S.%f', '%H:%M']\n              TIME_ZONE = 'UTC'\n              USE_ETAGS = False\n              USE_I18N = False\n              USE_L10N = True\n              USE_THOUSAND_SEPARATOR = False\n              USE_TZ = True\n              USE_X_FORWARDED_HOST = False\n              USE_X_FORWARDED_PORT = False\n              WSGI_APPLICATION = 'pkdb_app.wsgi.application'\n              X_FRAME_OPTIONS = 'SAMEORIGIN'\n              YEAR_MONTH_FORMAT = 'F Y'\n              \n              \n              You're seeing this error because you have DEBUG = True in your\n              Django settings file. Change that to False, and Django will\n              display a standard page generated by the handler for this status code.\n              \n              \""
-     ]
+     "data": {
+      "text/plain": [
+       "OrderedDict([('comment', None),\n",
+       "             ('description', None),\n",
+       "             ('title',\n",
+       "              '4-quinolones inhibit joiijojiojioijojioji of caffeine.'),\n",
+       "             ('pmid', '19125908'),\n",
+       "             ('authors',\n",
+       "              [OrderedDict([('id', 2),\n",
+       "                            ('first_name', 'C-Y'),\n",
+       "                            ('last_name', 'Fun')]),\n",
+       "               OrderedDict([('id', 3),\n",
+       "                            ('first_name', 'Y-L'),\n",
+       "                            ('last_name', 'Law')]),\n",
+       "               OrderedDict([('id', 4),\n",
+       "                            ('first_name', 'W-M'),\n",
+       "                            ('last_name', 'Lim')]),\n",
+       "               OrderedDict([('id', 5),\n",
+       "                            ('first_name', 'W'),\n",
+       "                            ('last_name', 'Fan')]),\n",
+       "               OrderedDict([('id', 6),\n",
+       "                            ('first_name', 'C-L'),\n",
+       "                            ('last_name', 'Lim')])]),\n",
+       "             ('abstract', None),\n",
+       "             ('file', None)])"
+      ]
+     },
+     "execution_count": 12,
+     "metadata": {},
+     "output_type": "execute_result"
     }
    ],
    "source": [
diff --git a/pkdb_app/data_management/fill_database.py b/pkdb_app/data_management/fill_database.py
index 4a6c511a..2e8da657 100644
--- a/pkdb_app/data_management/fill_database.py
+++ b/pkdb_app/data_management/fill_database.py
@@ -26,7 +26,7 @@ def upload_study(json_study):
 
 def get_graph(**options):
     graph = bonobo.Graph()
-    #add studies
+    # add studies
     graph.add_chain(
         get_study_json_path,
         open_json,
diff --git a/pkdb_app/studies/models.py b/pkdb_app/studies/models.py
index a4a84fa7..a33e1fb8 100644
--- a/pkdb_app/studies/models.py
+++ b/pkdb_app/studies/models.py
@@ -14,6 +14,7 @@ class Author(models.Model):
     def __str__(self):
         return '%s %s' % (self.first_name, self.last_name)
 
+
 class Study(Commentable, Describable, models.Model):
     """ Single clinical study.