1. Department of General Surgery, School of Medicine; Ankara University, Ankara, Turkey
2. Department of General Surgery, Champalimaud Cancer Foundation, Lisbon, Portugal
3. Department of General Surgery, School of Medicine; Acibadem Mehmet Ali Aydinlar, Istanbul, Turkey
4. Department of General Surgery, Universitatsklinikum Erlangen, Germany
5. Department of General Surgery, St Marks Hospital, United Kingdom
6. Division of Colorectal Surgery, Mayo Clinic, Jacksonville, Florida
7. Department of Colorectal Surgery, DDSI, Celeveland Clinic, Cleveland, Ohio
8. Division of Colon and Rectal Surgery, Department of Surgery, Korea University Anam Hospital, Seoul, South Korea
9. Division of Coloproctology, Department of Surgical Gastroenterology, Karolinska University Hospital, Stockholm, Sweden
10. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
11. Department of General Surgery, IRCCS Humanitas Research Hospital, Rozzano Milan, Italy
12. Department of Clinical Medicine, Center for Surgical Science, University of Copenhagen, Copenhagen, Denmark
13. Department of Colorectal Surgery, Beaujon Hospital and University of Paris, France
14. Department of Surgery, Tokyo Dental College Ichikawa General Hospital, Ichikawa, Japan
15. Department of Abdominal Surgical Oncology, N.N. Petrov National Medical Research Center of Oncology, Saint Petersburg, Russia
16. Department of General Surgery, Coloproctology Service, British Hospital of Buenos Aires, Buenos Aires, Argentina
17. Department of Colorectal Surgery, National Cancer Center Hospital East Chiba, Japan
18. Department of General, Abdominal and Vascular Surgery, University Hospital, Magdeburg, Germany