1. Department of Medicine, National Taiwan University Cancer Center, Taipei, Taiwan
2. College of Medicine, National Taiwan University, Taipei, Taiwan
3. School of Medicine, College of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan
4. Department of Internal Medicine, Fu Jen Catholic University Hospital, New Taipei City, Taiwan
5. Department of Internal Medicine, Taipei Medical University Hospital, Taipei, Taiwan
6. Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
7. Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
8. Digestive Disease Center, Chang-Bing Show-Chwan Memorial Hospital, Changhua, Taiwan
9. Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
10. Department of Internal Medicine, Shin Kong Wu Ho‐Su Memorial Hospital, Taipei, Taiwan
11. Department of Internal Medicine, Cathay General Hospital Medical Center, Taipei, Taiwan
12. Department of Surgery, Hsinchu Cathay General Hospital, Hsinchu, Taiwan
13. Department of Medicine, Division of Gastroenterology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan
14. Health Promotion Administration, Ministry of Health and Welfare, Taipei, Taiwan