1. Department of Pathology Harbin Medical University Harbin China
2. Department of Anus and Intestine Surgery Chifeng Municipal Hospital Chifeng China
3. Department of Anatomy Harbin Medical University Harbin China
4. Central Operating Department The First Affiliated Hospital of Harbin Medical University Harbin China
5. Department of Oncology Chifeng Municipal Hospital Chifeng China
6. Gastrointestinal Rehabilitation Center Beijing Rehabilitation Hospital of Capital Medical University Beijing China
7. Gastroenterology Department First Hospital of Dandong Dandong China
8. Department of Gynaecology Tumor Hospital of Harbin Medical University Harbin China