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. 2022 Jan 24;17(1):e0262545. doi: 10.1371/journal.pone.0262545

Fig 2. Partial least-squares discriminant analysis.

Fig 2

(A) cPMTb positive ion mode. (B) ST001231 positive ion mode. (C) cPMTb negative ion mode. (D) ST001231 negative ion mode. * optimal value of Q2; TB, tuberculosis; NC, normal control.