A Gilead Sequence Registry of Subjects Who Did Not Achieve Sustained Virologic Response

Key Inclusion Criteria: * Have previously participated in a Gilead-sponsored hepatitis C study and received at least one Gilead OAV * Have failed to achieve an SVR in a previous Gilead-sponsored study, as defined in the original treatment protocol * Provide written, informed consent * Be willing and able to comply with the visit schedule Key Exclusion Criteria: * Individuals planning to start a new course of hepatitis C therapy including any investigational drug or device during the course of the follow-up Registry * History of clinically significant illness or any other major medical disorder that may interfere with follow-up, assessments or compliance with the protocol Note: Other protocol defined Inclusion/Exclusion criteria may apply.