Patients co-infected with hepatitis B and/ or hepatitis C virus In Phase III studies, patients with chronic active hepatitis B and/ or hepatitis C co-infection (N = 113/ 699 or 16.2%; HBV=6%, HCV=9%, HBV+HCV=1%) were permitted to enrol provided that AST, ALT, and alkaline phosphatase tests did not exceed 5 times the upper limit of normal.