diff --git a/index.html b/index.html
index 18c85d3..5c1bb4e 100644
--- a/index.html
+++ b/index.html
@@ -645,11 +645,8 @@ <h2 class="title is-3">Citation</h2>
     <div class="hero-body">
         <div class="container">
             <h2 class="title is-3">Special Thanks </h2>
-            <div class="columns is-centered has-text-centered" style="width:90%; height:800px">
-                <p>This study is evaluated, thanks to the medical and surgical experts:</p>
-                <p> </p>
-                <iframe width="1200" height="800" seamless frameborder="0" scrolling="no" src="https://docs.google.com/spreadsheets/d/e/2PACX-1vR4v5xTrjIqKHdbrpb_-9Y6oVHQ8OTl8DMVk010JuAdBABfj0dB604OVdqPlaPbKDR8nKI3CFcdb-0N/pubchart?oid=1741363542&amp;format=interactive"></iframe>
-            </div>
+            <p>This study is evaluated, thanks to the medical and surgical experts:</p> <p> </p>
+            <iframe width="1500" height="1800" seamless frameborder="0" scrolling="no" src="https://docs.google.com/spreadsheets/d/e/2PACX-1vR4v5xTrjIqKHdbrpb_-9Y6oVHQ8OTl8DMVk010JuAdBABfj0dB604OVdqPlaPbKDR8nKI3CFcdb-0N/pubchart?oid=1741363542&amp;format=interactive"></iframe>
         </div>
     </div>
 </section>