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. 2019 Aug 12;6(1):e000314. doi: 10.1136/bmjgast-2019-000314

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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Result of UniFrac analysis of three microbiota communities. The overall bacterial community was demonstrated by unweighted and weighted UniFrac principal coordinate analyses. Squares, circles and triangles indicate the salivary, GF and faecal samples, respectively. Open and filled symbols represent PPI non-users and PPI users, respectively. Cited with permission from ref 9. GF, gastric fluid; PPI, proton-pump inhibitor; PCo 1, 2, Principal coordinate 1, 2