1. Department of GastroenterologyGongli Hospital, The Second Military Medical University Shanghai China
2. Department of GastroenterologyChanghai Hospital, The Second Military Medical University Shanghai China
3. Department of GastroenterologyFirst Affiliated Hospital, Zhejiang University School of Medicine Hangzhou China
4. Endoscopy CenterChanghai Hospital, The Second Military Medical University Shanghai China
5. Department of GastroenterologyZhongda Hospital, Southeast University Nanjing China
6. Department of General SurgeryRenji Hospital, Shanghai Jiaotong University Shanghai China
7. Department of GastroenterologyThe Second Clinical Medical College (Shenzhen People's Hospital), Jinan University Guangdong China