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. 2022 Dec 2;13:1014117. doi: 10.3389/fphar.2022.1014117

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Copyright © 2022 Bai, Xiong, Wang, Cheng, Luo, Yang and Fu.

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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Multivariate statistical analysis of serum mass spectrometry. (A) PLS-DA score plot in the positive ion mode; (B) 200 permutation tests of the PLS-DA score plot in the positive ion mode; (C) PLS-DA score plot in the negative ion mode; and (D) 200 permutation tests of the PLS-DA score plot in the negative ion mode.