Department of Gastroenterology, General Hospital of Air Force, PLA, Beijing 100142, China;
Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China;
Department of Gastroenterology, General Hospital of Air Force, PLA, Beijing 100142, China;
Department of Gastroenterology, General Hospital of Air Force, PLA, Beijing 100142, China;
Department of Gastroenterology, General Hospital of Air Force, PLA, Beijing 100142, China;
Department of Gastroenterology, General Hospital of Air Force, PLA, Beijing 100142, China;
Department of Gastroenterology, General Hospital of Air Force, PLA, Beijing 100142, China;
Department of Gastroenterology, General Hospital of Air Force, PLA, Beijing 100142, China;
Department of Gastroenterology, General Hospital of Air Force, PLA, Beijing 100142, China;
Department of Gastroenterology, General Hospital of Air Force, PLA, Beijing 100142, China;
Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China;