Figure 2: Classification and regression tree (CART) algorithm, as result of the analysis of the SELDI-TOF-MS results (SS, Sjögren’s syndrome; HC, healthy control, V63=16547 m/z, V66=24059 m/z, V54=13507 m/z, V55=13714 m/z, V34=7149 m/z, V35=7192 m/z).