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 Microbiology, National Taiwan University College of Medicine Taipei, Taiwan
4. Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
5. Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan