1. Department of Gastroenterology, Changhai Hospital; The Second Military Medical University; Shanghai China
2. Digestive Endoscopy Center, Changhai Hospital; The Second Military Medical University; Shanghai China
3. Department of Surgery; Jinling Hospital; Nanjing China
4. Department of Gastroenterology, Zhongda Hospital; Southeast University; Nanjing China
5. Department of Gastroenterology; Air Force General Hospital; Beijing China
6. Department of Traditional Chinese Medicine; Jiangdu Hospital; Yangzhou China