CXCL9 and autoimmune hepatitis: In a comparative study of the serum levels of 21 different cytokines and chemokines in 148 patients with either AIH, PBC or PSC, 54 patients with chronic hepatitis C infection and 50 healthy controls revealed an increased expression of IL-6, IL-8, IL-10, chemokine (C-C motif) ligand 4 (CCL4), CCL26, chemokine (C-X-C motif) ligand (CXCL9), and CXCL10 in all patients with autoimmune liver diseases.