Study to Investigate the Efficacy and Safety of Sofosbuvir/Velpatasvir (SOF/VEL) Fixed-Dose Combination (FDC) and Sofosbuvir/Velpatasvir/Voxilaprevir (SOF/VEL/VOX ) FDC for 12 Weeks in Adults With Chronic Hepatitis C Virus (HCV) Infection

Seoul National University Bundang Hospital, Seongnam-si

The Catholic University of Korea, Incheon St. Mary's Hospital, Incheon

Chungnam National University Hospital, Daejeon

Kyungpook National University Hospital, Daegu

Keimyung University Dongsan Hospital, Daegu

Ulsan University Hospital, Ulsan

Inje University Busan Paik Hospital, Busan

Dong-A University Hospital, Busan

Pusan National University Hospital, Busan

Pusan National University Yangsan Hospital, Yangsan

Chonbuk National University Hospital, Jeonju

Chosun University Hospital, Gwangju

Gachon University Gil Medical Center, Incheon

Seoul National University Hospital, Seoul

Severance Hospital, Seoul

VHS (Veterans Health Service) Medical Center, Seoul

Asan Medical Center, Seoul

Samsung Medical Center, Seoul

The Catholic University of Korea, Seoul Saint Mary's Hospital, Seoul

Chung-Ang University Hospital, Seoul

SMG-SNU Boramae Medical Center, Seoul

Korea University Guro Hospital, Seoul