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. 2018 Sep 23;2018:8514619. doi: 10.1155/2018/8514619

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Copyright © 2018 Xuan Shi et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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PLS-DA and VIP-score plot in the positive and negative modes. The combination of S- and VIP-score plot in the (a) positive and (b) negative modes showed that a greater number of values obtained from the lung tissues were further away from the origin. Score plots of the principal component analysis performed on the HPLC/MS profile of rat lung tissues obtained from the sham group (black squares), model group (red rounds), and treatment group (blue rhombus) in the (c) positive mode and (d) negative mode.