CXCL13 and peeling skin syndrome: The levels of CXC ligand 13 protein (CXCL13), a B cell homeostatic chemokine, were elevated in serum (162 ± 184 pg/ml vs. 26.8 ± 22.8 pg/ml, P < 0.0001) and saliva (368 ± 631 pg/ml vs. 26.7 ± 36.8 pg/ml, P = 0.0016) in patients with pSS, compared to healthy controls using the enzyme-linked immunosorbent assay (ELISA).