1. Department of Gastroenterology The First Affiliated Hospital of Nanchang University Nanchang China
2. Department of General Surgery The Third Affiliated Hospital of Soochow University Changzhou China
3. Department of Gastroenterology The First Affiliated Hospital of Huzhou Teachers College Huzhou China
4. Department of Gastroenterology The First Affiliated Hospital of Nanjing Medical University Nanjing China