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. 2020 Nov 6;11:603899. doi: 10.3389/fphar.2020.603899

FIGURE 2.

FIGURE 2

The representative total intensity chromatograms (TIC) of OLP and healthy group serum samples. TIC of OLP group obtained from the training set in (A) positive mode and (B) negative mode. TIC of healthy control obtained from the training set in (C) positive mode and (D) negative mode.