1. Division of Colorectal Surgery Changzheng Hospital, Navy Medical University Shanghai P. R. China
2. Institute of Higher Education, Tongji University Shanghai P. R. China
3. Department of Gastrointestinal Surgery Tongji Hospital, Tongji University School of Medicine Shanghai P. R. China
4. Department of Gastroenterology Shuguang Hospital, Shanghai University of Traditional Chinese Medicine Shanghai P. R. China
5. Department of Colorectal Surgery Fudan University Shanghai Cancer Center Shanghai P. R. China
6. Department of Oncology Shanghai Medical College, Fudan University Shanghai P. R. China