1. Graduate Institute of Clinical Medicine; National Taiwan University; Taipei Taiwan
2. Institute of Epidemiology and Preventive Medicine; National Taiwan University; Taipei Taiwan
3. Liver Research Unit; Chang Gung Memorial Hospital, Chang Gung University College of Medicine; Taipei Taiwan
4. Faculty of Medicine; National Yang-Ming University School of Medicine; Taipei Taiwan
5. Division of Gastroenterology; Department of Medicine, Cheng Hsin General Hospital; Taipei Taiwan
6. Hepatitis Research Center; National Taiwan University; Taipei Taiwan