TY - JOUR T1 - Hepatic steatosis and insulin resistance are associated with severe fibrosis in patients with chronic hepatitis caused by HBV or HCV infection JF - Liver Int Y1 - 2011 A1 - Petta, S A1 - Camma, C A1 - DiMarco, V A1 - et, al VL - 31 SP - 507-515 ER -