Institution: | 1. Department of Medicine, Division of Gastroenterology and Hepatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA;2. Department of Surgery, The University of Hong Kong, Hong Kong, SAR, China;3. Department of Gastroenterology and Hepatology, the First Affiliated Hospital, Sun Yat‐sen University, Guangzhou, China;4. Department of Medicine, University of Illinois College of Medicine, Chicago, IL, USA |