1. Department of Endoscopy, The Affiliated Cancer Hospital, Harbin Medical University, Harbin, China
2. Department of Gastrointestinal Surgery, The Affiliated Cancer Hospital, Harbin Medical University, Harbin, China
3. Department of General Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
4. Department of General Surgery, Central Hospital of Jiuzhen, China
5. Department of Gastroenterology, The First Hospital of Longyan, Fujian Medical University, Longyan, China
6. Department of Pathology, Hongqi Hospital, Mudanjiang Medical University, Mudanjiang, China
7. Department of Digestive Disease, Hongqi Hospital, Mudanjiang Medical University, Mudanjiang, China
8. Department of Ultrasound of Obstetrics and Gynecology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
9. Department of Medical Imaging, The Affiliated Cancer Hospital of Harbin Medical University, Harbin, China
10. Department of Pathology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
11. The Second Hospital of Longyan, Fujian Medical University, Longyan, China