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. 2020 Apr 24;8:e9050. doi: 10.7717/peerj.9050

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©2020 Wan et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

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(A–B) Chao1 index for assessing bacterial abundance. (C–D) Shannon index for assessing bacterial diversity. Data represent the mean ± SD of values per group. ^∗P < 0.05 and ^∗∗∗P < 0.001.