1. Department of General Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai , China
2. Department of General Surgery, Peking Union Medical College Hospital , Beijing , China
3. Department of General Surgery, Beijing Friendship Hospital, Capital Medical University , Beijing , China
4. Department of General Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai , China
5. Department of General Surgery, Tangdu Hospital , Shanxi , China
6. Department of General Surgery, The First Hospital of Jilin University , Jilin , China
7. Department of Colorectal Surgery, Cancer Hospital Chinese Academy of Medical Sciences , Beijing , China
8. Section for Surgical Research, Department of Surgery, Medical University of Graz , Graz , Austria