Affiliation: | 1. Institute of Digestive Disease, The Chinese University of Hong Kong, , Hong Kong, China;2. Department of Gastroenterology and Hepatology, Concord Repatriation Hospital, , Sydney, Australia;3. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, , Hong Kong, China;4. Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, , Seoul, Korea |