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, P. R. China
2. Poole Hospital NHS Trust, Poole, UK
3. European Center of Coloproctology and Pelvic Diseases-Multimedica Hospital, Milan, Italy
4. Department of GI Surgical Oncology, Tata Memorial Hospital, Mumbai, India
5. Department of Colorectal Surgery, Cairo University, Cairo, Egypt
6. Department of Gastrointestinal Surgery, Zhongshan Hospital of Xiamen University, Xiamen, Fujian, P. R. China
7. Section of Colon and Rectal Surgery, Creighton University School of Medicine, Omaha, NE, USA
8. Department of General Surgery, Chinese People’s Liberation Army General Hospital, Beijing, P. R. China
9. Department of Gastrointestinal Surgery, Inonu University, Malatya, Turkey
10. Department of Surgery, Hospital de Braga, Braga, Portugal
11. Department of Colorectal Cancer Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, P. R. China
12. Department of Gastroenterological Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, P. R. China
13. Department of General Surgery, Shandong University Qilu Hospital, Jinan, Shandong, P. R. China
14. Department of Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea
15. Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, P. R. China
16. Department of General Surgery, Jiangsu Province Hospital of Traditional Chinese Medicine, Nanjing, Jiangsu, P. R. China
17. Department of Colorectal Surgery, Portsmouth, Hospitals NHS, Trust, Queen Alexandra Hospital, Portsmouth, UK
18. King’s College Hospital, London, UK
19. Department of Colorectal Surgery, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, P. R. China
20. Division of Surgical Oncology, Department of Surgery, Nagoya University School of Medicine, Nagoya, Japan
21. Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, P. R. China
22. Department of Gastric Cancer, Tianjin Medical University Cancer Institute & Hospital, Tianjin, P. R. China
23. Department of Gastroenterology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, P. R. China
24. Department of Obstetrics and Gynecology, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, P. R. China
25. Department of General Surgery, Xinqiao, Hospital, Third Military Medical University, Chongqing, P. R. China
26. Department of Surgery, China Medical University Hospital, Taichung, Taiwan, China
27. Department of Surgery, Shaheed Suhrawardy Medical College, Dhaka, Bangladesh
28. Department of Surgery, Klaipeda University Hospital, Klaipeda, Lithuania
29. Department of Gastrointestinal Surgery, Shenzhen People’s Hospital & Second Clinical Medical College of Jinan University, Shenzhen, Guangdong, P. R. China
30. Clinic of Colorectal and Minimally Invasive Surgery, Sechenov First Moscow State Medical University, Moscow, Russia
31. Department of General Surgery, Zhongshan, Hospital, Fudan University, Shanghai, P. R. China
32. Universidad Central de Venezuela, Centro, Medico Loira, Caracas, Venezuela
33. Colorectal Surgery Department, Sechenov First Moscow State Medical University, Moscow, Russia
34. Department of Surgery, Yang Hospital, Seoul, South Korea
35. Department of Surgery, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, South Korea
36. Department of Gastric and Colorectal Surgery, Jilin University First Hospital, Changchun, Jilin, P. R. China
37. Department of Gynecologic Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P. R. China
38. Department of Pancreatic and Gastric Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P. R. China
39. Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, P. R. China
40. Department of General Surgery, Shanxi, Provincial, People’s, Hospital, The, Third Affiliated, Hospital, Medical College, Xi’an Jiao Tong University, Xi’an, Shaanxi, P. R. China
41. Department of surgery, Samsung Medical Center, Sungkyunkwan University, Seoul, South Korea
42. Department of Gastrointestinal Surgery, Qinghai University Affiliated Hospital, Xining, Qinghai, P. R. China
43. Department of Gastrointestinal Surgery, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, P. R. China
44. Department of General Surgery, Qilu Hospital of Shandong University (Qingdao), Qingdao, Shandong, P. R. China
45. Department of General Surgery, Center of Minimal Invasive Gastrointestinal Surgery, Southwest, Hospital, Army Medical University (Third Military Medical University), Chongqing, P. R. China
46. Endoscopy Center and Endoscopy Research Institute, Zhongshan, Hospital, Fudan University, Shanghai, P. R. China