['hepatitis c virus infection']
['sof/vel/vox', 'rbv']

        Key Inclusion Criteria:

          -  Individuals with chronic HCV genotype 1 infection

          -  Documented as treatment experienced with a direct acting antiviral-containing regimen
             without achieving sustained viral response

          -  Absence of cirrhosis or presence of compensated cirrhosis

          -  Screening laboratory values within defined thresholds

          -  Must use specific contraceptive methods if female of childbearing potential or
             sexually active male

        Key Exclusion Criteria:

          -  Co-infection with HIV or hepatitis B virus (HBV)

          -  Current or prior history of clinical hepatic decompensation

          -  Chronic use of systemic immunosuppressive agents

          -  History of clinically significant illness or any other medical disorder that may
             interfere with individual's treatment, assessment or compliance with the protocol

          -  Pregnant or a nursing female

        Note: Other protocol defined Inclusion/Exclusion criteria may apply.
      