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+## External SOPs
+
+| Title |  Organisation | Category |  Link |
+| ------ | ------ | ------ | ------ |
+| Standard operating procedure for fecal samples identification | International Human Microbiome Standards (IHMS) | Sample Collection |  [SOP 01](https://human-microbiome.org/index.php?id=Sop&num=001) |
+| Standard operating procedure for fecal samples self-Collection, laboratory analysis handled within 4 hours | International Human Microbiome Standards (IHMS) | Sample Collection |  [SOP 02](https://human-microbiome.org/index.php?id=Sop&num=002) |
+| Standard operating procedure for fecal samples self-Collection, laboratory analysis handled within 4 to 24 hours  | International Human Microbiome Standards (IHMS) | Sample Collection |  [SOP 03](https://human-microbiome.org/index.php?id=Sop&num=003) |
+| Standard operating procedure for fecal samples frozen preserved self-Collection, laboratory analysis handled within 24 hours to 7 days  | International Human Microbiome Standards (IHMS) | Sample Collection |  [SOP 04](https://human-microbiome.org/index.php?id=Sop&num=004) |
+| Standard operating procedure for fecal samples preserved in stabilizing solution self-Collection, laboratory analysis handled within 24 hours to 7 days | International Human Microbiome Standards (IHMS) | Sample Collection |  [SOP 05](https://human-microbiome.org/index.php?id=Sop&num=005) |
+| Standard operating procedure for fecal samples DNA Extraction, protocol Q | International Human Microbiome Standards (IHMS) | DNA Extraction |  [SOP 06](https://human-microbiome.org/index.php?id=Sop&num=006) |
+| Standard operating procedure for fecal samples DNA Extraction, protocol H | International Human Microbiome Standards (IHMS) | DNA Extraction |  [SOP 07](https://human-microbiome.org/index.php?id=Sop&num=007) |
+| DNA Extraction Protocol| Earth Microbiome | DNA Extraction |  [DNA Extraction Protocol](https://www.protocols.io/view/earth-microbiome-project-emp-high-throughput-htp-d-8epv5qqjv1bz/v1) |
+|16S Illumina Amplicon Protocol | Earth Microbiome | DNA Sequencing |  [16S Illumina Amplicon Protocol](https://www.protocols.io/view/emp-16s-illumina-amplicon-protocol-kqdg3dzzl25z/v2) |
+|18S Illumina Amplicon Protocol| Earth Microbiome | DNA Sequencing |  [16S Illumina Amplicon Protocol](https://www.protocols.io/view/emp-18s-illumina-amplicon-protocol-ewov1b6pgr24/v2) |
+|ITS Illumina Amplicon Protocol| Earth Microbiome | DNA Sequencing |  [ITS Illumina Amplicon Protocol](https://www.protocols.io/view/emp-its-illumina-amplicon-protocol-14egnqypg5dy/v1) |