Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore and Gleneagles Hospital, Singapore City, Singapore. Faculty of Medicine & Faculty of Health & Behavioural Sciences, University of Queensland and Department of Gastroenterology & Hepatology, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia. Department of Gastroenterology, University Hospitals Leuven, Leuven, Belgium. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Tokai University School of Medicine, Tokyo, Japan. Gastroenterology Department, Wuhan Union Hospital, Huazhong Science & Technology University, Wuhan, China. Division of Gastroenterology and Hepatology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. Division of Gastroenterology, Wuhan Union Hospital, Huazhong Science & Technology University, Wuhan, China. Division of Gastroenterology, Department of Internal Medicine, and Department of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan. Independent Researcher, Stomach, Liver & Bowel Centre, Gleneagles Hospital, Singapore City, Singapore. Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China.