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RESPOND-2 Study Design (Treatment Failure Trial) 12 24 48 72 Arm 1 : SOC Comparator PEG + RBV 4 wk Placebo + PEG + RBV 44 wk Follow-up 24 wk TW 8 HCV-RNA Undetectable Arm 2 : Response Guided Therapy EXPERIMENTAL ARMS SCREENING CONTROL Weeks PEG + RBV 4 wk BOC + PEG + RBV 32 wk Follow-up 36 wk TW 8 HCV-RNA Detectable/TW 12 Undetectable Placebo + PEG + RBV 12 wk Follow-up 24 wk Arm 3: SOC + Boceprevir PEG + RBV 4 wk BOC+ PEG + RBV 44 wk Follow-up 24 wk 1