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. 2019 Jun 12;10:1321. doi: 10.3389/fmicb.2019.01321

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Copyright © 2019 Zhang, Riaz, Zhang, El-desouki 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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Multidimensional grouping principal component analysis. The points in the figure are the average values of the subgroups on the PC1 and PC2 axes, and the error bar is the standard deviation of the subgroups in the direction of PC1 and PC2.