1. Chronic hepatitis C virus infection: developing direct-acting antiviral drugs for treatment Publication: Silver Spring, MD : Center for Drug Evaluation and Research, November 2017 Subject(s): Antiviral Agents -- therapeutic useClinical Trials as TopicDrug Evaluation, Preclinical -- standardsDrugs, Investigational -- therapeutic useHepatitis C, Chronic -- drug therapyAntiviral Agents -- pharmacokineticsDrugs, Investigational -- pharmacokineticsResearch Design -- standardsHumansUnited StatesUnited States. Department of Health and Human Services.United States. Food and Drug Administration.