1. Division of Gastroenterology; Department of Internal Medicine; Mackay Memorial Hospital; Mackay Medicine, Nursing and Management College; Taipei Taiwan
2. Department of Integrated Diagnostics and Therapeutics; National Taiwan University Hospital; Taipei Taiwan
3. Division of Colon and Rectal Surgery; Department of Surgery; Taipei Veterans General Hospital; Taipei Taiwan
4. Division of Gastroenterology; Department of Internal Medicine; Changhua Christian Hospital; Changhua Taiwan
5. Division of Gastroenterology; Department of Internal Medicine; National Cheng Kung University Hospital; Tainan Taiwan
6. Division of Gastroenterology; Department of Internal Medicine; Kaohsiung Municipal Hsiaokang Hospital; Kaohsiung Taiwan
7. Division of Colon and Rectal Surgery; Department of Surgery; Linkou Chang Gung Memorial Hospital; Graduate Institute of Clinical Medical Science; Chang Gung University; Taoyuan Taiwan
8. Department of Internal Medicine; National Taiwan University Hospital; Taipei Taiwan