1. Division of Gastroenterology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
2. National Yang-Ming University School of Medicine, Taipei, Taiwan
3. Division of Gastroenterology, Department of Internal Medicine, Renai Branch, Taipei City Hospital, Taipei, Taiwan
4. Institute of Public Health, National Yang-Ming University, Taipei, Taiwan
5. Department of Dermatology, Taipei Veterans General Hospital, Taipei, Taiwan
6. Department of Dermatology, Heping Fuyou Branch, Taipei City Hospital, Taipei, Taiwan
7. Department of Pathology, Taipei Veterans General Hospital, Taipei, Taiwan
8. Division of General Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
9. Department of Medicine, National Yang-Ming University Hospital, Yilan, Taiwan
10. Division of Oncology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
11. Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
12. Department of Oncology Medicine, Taipei Veterans General Hospital, Taipei, Taiwan