Figure 11: 3D plot of the first three components resulting from the principal component analysis (PCA) of the MALDI spectra of patients and controls, using data that were statistically different at ANOVA ( ). The ovals indicate the regions of the principal component space containing data related to the different populations (healthy subjects as well as diabetic, nephropathic, and diabetic-nephropathic patients). From [42], by kind permission of Wiley and Sons through RightsLink, License no. 3064280001291.