1. Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong (J.Y.L., R.S.T., H.C., B.S., F.K.C.)
2. Division of Gastroenterology, Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand (R.P., R.R.)
3. Changi General Hospital, Singapore (A.K., J.L., T.L.A.)
4. Department of Surgery, Prince of Wales Hospital, Shatin, Hong Kong (Y.Y.)
5. Nanyang Technological University, Singapore (J.J.S.).