1. Department of Colorectal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China
2. Department of Colorectal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Hebei Cancer Hospital Chinese Academy of Medical Sciences Langfang China
3. Department of Colorectal Surgery, Changhai Hospital Nava Military Medical University Shanghai China
4. Department of Gastrointestinal Surgery, Ruijin Hospital Shanghai Jiao Tong University School of Medicine, Shanghai Minimally Invasive Surgery Center Shanghai China
5. Department of General Surgery, Beijing Friendship Hospital Capital Medical University, National Clinical Research Center for Digestive Diseases Beijing China
6. Department of General Surgery Peking University First Hospital Beijing China