Affiliation: | 1. Department of Digestive Disease, The First People's Hospital of Changzhou, Changzhou, Jiangsu Province, China;2. Department of Digestive Endoscopy and Medical Center for Digestive Diseases, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China;3. Department of Digestive Endoscopy, The First Affiliated Hospital with Nanjing Medical University, Nanjing, Jiangsu Province, China |