In the first study, CXCL10 serum levels were significantly (P < 0.02) higher in patients with chronic hepatitis C (509.8 ± 365.4 pg/mL, mean ± s.d.)than in healthy controls (30.8 ± 20.0 pg/mL, mean ± s.d.). Here, CXCL10 is linked to chronic hepatitis C virus infection.