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. 2019 Apr 3;10:643. doi: 10.3389/fmicb.2019.00643

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Copyright © 2019 Ma, Ding, Liu, Fang, Yan, Duraipandiyan, Al-Dhabi, Esmail and Jiang.

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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Plots of the multivariate statistical comparisons between groups. (A1) A PCA score plot of all samples (ESI+). (A2) PCA score plot of all samples (ESI-). (B1) PLS-DA score plot of CR-IRW+CR (ESI+). (B2) PLS-DA score plot of CR-IRW+CR (ESI-). (B3) PLS-DA score plot of CR-IRW+CR. (C1) OPLS-DA score plot of CR-IQW+CR (ESI+). (C2) OPLS-DA score plot of CR-IQW+CR (ESI-).