1. Division of Gastroenterology; Department of Internal Medicine; Buddhist Tzu Chi General Hospital, Taipei Branch; Taipei Taiwan
2. School of Medicine; Tzu Chi University; Hualien Taiwan
3. Graduate Institute of Clinical Medicine; National Taiwan University College of Medicine and National Taiwan University Hospital; Taipei Taiwan
4. Department of Internal Medicine; National Taiwan University College of Medicine and National Taiwan University Hospital; Taipei Taiwan
5. Department of Medical Research; National Taiwan University College of Medicine and National Taiwan University Hospital; Taipei Taiwan
6. Hepatitis Research Center; National Taiwan University College of Medicine and National Taiwan University Hospital; Taipei Taiwan