243 ENDOGENOUS ERYTHROPOIETIN RESPONSE AND PREDICTIVE FACTORS FOR ANEMIA DURING TREATMENT WITH PEG-INTERFERON ALFA-2B AND RIBAVIRIN IN CHRONIC HEPATITIS C PATIENTS - van Vlerken, L.G.; van Soest, H.; Janssen, M.P.; Boland, G.J.; Drenth, J.P.H.; Burger, D.M.; Siersema, P.D.; van Erpecum, K.J. (Journal of Hepatology, 2010)