Fig. 1

Partial least squares discriminant analysis (PLS-DA) of the reversed phase positive ESI–MS mode data. The score plot shows the individual samples in both case and control groups. Case group (black circles); Control group (grey squares)
Partial least squares discriminant analysis (PLS-DA) of the reversed phase positive ESI–MS mode data. The score plot shows the individual samples in both case and control groups. Case group (black circles); Control group (grey squares)