1. Department of Gastroenterology and Hepatology, E-Da Cancer Hospital, Kaohsiung, Taiwan;
2. Department of Gastroenterology and Hepatology, I-Shou University, Kaohsiung, Taiwan;
3. Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan;
4. Department of Public Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan;
5. Department of Internal Medicine, Fu Jen Catholic University Hospital, New Taipei, Taiwan;
6. School of Medicine, College of Medicine, Fu Jen Catholic University, New Taipei, Taiwan;
7. Department of Internal Medicine, Chia-Yi Christian Hospital, Chiayi, Taiwan;
8. Division of Gastroenterology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan;
9. Department of Pathology, National Taiwan University Hospital, Taipei, Taiwan;
10. Department of Internal Medicine, National Taiwan University Cancer Center, Taipei, Taiwan;
11. Department of Gastroenterology and Hepatology, E-Da Hospital, Kaohsiung, Taiwan.