1. Department of Gastrointestinal Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China.
2. Division of Gastroenterology and Hepatology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China.
3. Department of General Surgery, Baoshan Branch, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China.
4. School of medicine, Shanghai Jiaotong University, Shanghai, China.
5. Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China.