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PCA and partial least squares discriminant analysis (PLS-DA). (A) The PCA scores plot of PC1 (first principal component) vs. PC2 (second principal component) showing the separation between control group (red), model group (green) and TFPS group (blue); (B) The PLS-DA score plot of control group (red), model group (green) and TFPS group (blue); (C) PLS-DA (3D) spots of control group (green), model group (blue) and TFPS group (red).
