%SVR, percentage sustained viral response. Data from SPRINT-2 (boceprevir, BOC)  and ADVANCE (telaprevir, T) clinical trials . SPRINT-2 regime: PegIFN/R for 48 weeks. BOC/RGT: PegIFN/R for 4 weeks, then 24 weeks; BOC and PegIFN/R if HCV undetectable, 44 weeks if not. BOC/PR48: PegIFN/R for 4 weeks, then 44 weeks BOC and PegIFN/R. No hepatitis C virus (HCV) based on detection at 8 weeks. ADVANCE regime: PegIFN/R for 48 weeks. T8 24/48: telaprevir for 8 weeks, PegIFN/R for 24 or 48 weeks, dependent on HCV at 4 and 12 weeks. T12 24/48: telaprevir for 12 weeks, PegIFN/R for 24/48 weeks. No HCV based on detection at 4 and 12 weeks of treatment.