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. 2021 Mar 8;12:625562. doi: 10.3389/fmicb.2021.625562

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Copyright © 2021 Jang, Son, Kim, Jung, Choi, Kim, Lee, Shin and Kim.

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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Principal component analysis (PCA) of clinical data. From PCA (R²X, 0.451; Q², 0.0698), individual data sets were labeled as before and after the overall clinical trial (A) or before and after the clinical trial of each bacterial strain (B).