['chronic hcv infection']
['ldv/sof', 'sof', 'rbv']

        Inclusion Criteria:

          -  Hemophilia A, B or C, or Von Willebrand's disease

          -  Chronic genotype 1, 2, 3 or 4 HCV infection

          -  HCV RNA ≥ 1000 IU/mL at screening

          -  Use of protocol specified method(s) of contraception if female of childbearing
             potential or sexually active male

          -  Screening laboratory values within defined thresholds

          -  For HIV-1/HCV co-infected individuals:

               -  Suppressed HIV-1 RNA on an antiretroviral (ARV) regimen for at least 6 months
                  prior to screening

               -  Stable protocol-approved ARV regimen for > 8 weeks prior to screening

               -  CD4 T-cell count > 200 cells/mm^3 at screening

        Exclusion Criteria:

          -  Clinically-significant illness (other than HCV, inherited bleeding disorder or HIV-1)
             or any other major medical disorder that may interfere with subject treatment,
             assessment or compliance with the protocol

          -  Current or prior history of any of the following:

               -  Hepatic decompensation

               -  Chronic liver disease of a non-HCV etiology

               -  Hepatocellular carcinoma (HCC)

               -  Infection with hepatitis B virus (HBV)

          -  Pregnant or nursing female

          -  Prior treatment with inhibitors of nonstructural protein 5A (NS5A) or the NS5B
             polymerase

          -  Chronic use of systemically administered immunosuppressive agents

          -  For HIV-1/HCV co-infected individuals:

               -  Opportunistic infection within 6 months prior to screening

               -  Active, serious infection (other than HIV-1 or HCV) requiring parental
                  antibiotics, antivirals or antifungals within 30 days prior to baseline
      