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Score plots of PCA model and the first three latent components of PLS- DA model. (A) Three-dimensional score plot of the PCA model of all samples in the ESI+ and ESI− ion modes. (B, C) Score plots for the first three latent components of the PLS-DA model for CG vs Control, CG vs GC, GC vs Control, and CG plus GC vs Control in the ESI+ and ESI− ion modes, respectively. Healthy volunteers, control, CG, chronic gastritis; GC, gastric cancer.
