Tai-Chung Tseng1,2,3, Jer-Wei Wu4, Jia-Horng Kao1,2,3,5. 1. Division of Gastroenterology and Hepatology, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan. 2. Hepatitis Research Center, National Taiwan University Hospital, Taipei, Taiwan. 3. Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan. 4. Department of Internal Medicine, National Taiwan University Hospital Jin-Shan Branch, New Taipei City, Taiwan. 5. Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan.