Government of the People's Republic of China - Tangdu Hospital, Department of Gastroenterology, Air Force Hospital of Western Theater Command - Department of Medical Affairs, Government of the People's Republic of China - Tangdu Hospital, Department of General Surgery, Shanxi Academy of Medical Sciences - Department of Digestive Disease, Government of the People's Republic of China - Department of General Surgery, Air Force Hospital of Western Theater Command - Department of Medical Affairs, Government of the People's Republic of China - Tangdu Hospital, Department of Traditional Chinese Medicine, Government of the People's Republic of China - Xijing Hospital, Department of Cardiology, General Hospital of Northern Theater Command - Department of Neurosurgery, Southern Medical University, General Hospital of Northern Theater Command - Department of Neurosurgery and Government of the People's Republic of China - Tangdu Hospital, Department of Gastroenterology

Government of the People's Republic of China - Tangdu Hospital, Department of General Surgery, Government of the People's Republic of China - Department of General Surgery, Government of the People's Republic of China - Xijing Hopsital of Digestive Diseases, Department of Liver Disease and Digestive Interventional Radiology, Aeromedicine Identification and Training Centre of Air Force -Department of Drug and Equipment, Government of the People's Republic of China - Tangdu Hospital, Department of General Surgery, Government of the People's Republic of China - Xijing Hopsital of Digestive Diseases, Department of Liver Disease and Digestive Interventional Radiology, Government of the People's Republic of China - Tangdu Hospital, Department of General Surgery, Government of the People's Republic of China - Tangdu Hospital, Department of General Surgery, Government of the People's Republic of China - Tangdu Hospital, Department of Gastroenterology, Government of the People's Republic of China - Tangdu Hospital - Department of General Surgery, Government of the People's Republic of China - Tangdu Hospital - Department of General Surgery and Government of the People's Republic of China - Tangdu Hospital, Department of Gastroenterology