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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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The UniFrac analysis of the three bacterial communities. The overall bacterial community structure was demonstrated by an unweighted and weighted UniFrac principal coordinate analysis (PCoA). Square, circle, and triangle symbols indicate the salivary, gastric fluid (GF), and fecal samples, respectively. Open and filled symbols represent proton-pump inhibitor (PPI)-nonusers and PPI-users, respectively.