244 RIBAVIRIN-RATHER THAN PEG-INTERFERON-RELATED FACTORS ARE PREDICTING NON-RESPONSE TO ANTIVIRAL THERAPY IN NAIVE CHRONIC HEPATITIS C PATIENTS - van Vlerken, L.G.; Huisman, E.J.; van Soest, H.; Boland, G.J.; Siersema, P.D.; Burger, D.M.; van Erpecum, K.J. (Journal of Hepatology, 2010)