Department of Gastroenterology, Peking Union Medical College Hospital, Beijing 100730, China;
Department of Gastroenterolgy, First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China;
Department of Intensive Care, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China;
Department of Gastroenterology, Peking Union Medical College Hospital, Beijing 100730, China;
Department of Gastroenterology, Peking Union Medical College Hospital, Beijing 100730, China;
Department of Gastroenterology, Peking Union Medical College Hospital, Beijing 100730, China;
Department of Gastroenterology-A31, The Cleveland Clinic Foundation, 9500 Euclid Ave, Cleveland OH 44195, USA;