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. 2021 Mar 3;11:559148. doi: 10.3389/fcimb.2021.559148

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Copyright © 2021 Zhang, Li, Cao and Zhang

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The microbial α diversity and β diversity analysis in different groups. (A) Rarefaction curves for operational taxonomic units (OTUs). (B) Chao 1 index was higher in atrophic gastritis (AG) compared with superficial gastritis (SG) and gastric cancer (GC) and (C) there was no significant difference in Shannon index among the four groups (Student’s t-test was used to compare each two groups). (D) Partial least squares Discriminant Analysis revealed different microbial community structures in the four groups (ANOSIM was used to evaluate the similarity among groups).