1. Department of Gastroenterology, Renai Branch, Taipei City Hospital, Taipei, Taiwan
2. Department of Psychology, National Chengchi University, Taipei, Taiwan
3. Graduate Institute of Clinical Medicine, National Taiwan University, College of Medicine, Taipei, Taiwan
4. Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
5. Hepatitis Research Center, and Department of Medical Research, National Taiwan University, National Taiwan University Hospital, Taipei, Taiwan