Gastroenterology Research Institute, Southwest Hospital, Third Military Medical University, Chongqing 400038, China;
Departmentof Gastroenterology, General Hospital of Armed Police, Beijing 100039, China;
Gastroenterology Research Institute, Southwest Hospital, Third Military Medical University, Chongqing 400038, China;
Gastroenterology Research Institute, Southwest Hospital, Third Military Medical University, Chongqing 400038, China;
Gastroenterology Research Institute, Southwest Hospital, Third Military Medical University, Chongqing 400038, China;
Gastroenterology Research Institute, Southwest Hospital, Third Military Medical University, Chongqing 400038, China;
Gastroenterology Research Institute, Southwest Hospital, Third Military Medical University, Chongqing 400038, China;
Gastroenterology Research Institute, Southwest Hospital, Third Military Medical University, Chongqing 400038, China;