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. 2015 Jun 11;6(6):e89. doi: 10.1038/ctg.2015.20

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Copyright © 2015 American College of Gastroenterology

Clinical and Translational Gastroenterology is an open-access journal published by Nature Publishing Group. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/

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Hierarchical clustering analysis of the individual bacterial community. A weighted UniFrac distance-based hierarchical clustering analysis was performed for the bacterial community of individuals, and the result was shown using a cluster dendrogram. The sample ID of each subject is shown at the bottom. The shaded box indicates the salivary and gastric fluid (GF) sample pairs in one individual. An arrow indicates the boundary of the two distinct clusters. The prefix “P-” represents proton-pump inhibitor (PPI)-users. The suffixes “S”, “G”, and “F” represent saliva, GF, and feces, respectively.