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

FIGURE 2.

FIGURE 2

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.