1. Department of Colorectal Surgery, University Hospital Zurich , Zurich , Switzerland
2. Department of Surgery, Seoul National University College of Medicine , Seoul , Korea
3. Department of Surgery, University of British Columbia, St Paul’s Hospital , Vancouver, British Columbia , Canada
4. Bellvitge University Hospital, Department of General and Digestive Surgery, and IDIBELL, University of Barcelona , Barcelona , Spain
5. Department of Colorectal Surgery and Surgical Technology, National Cancer Centre Hospital East , Kashiwa, Chiba , Japan
6. Department of Surgery, Campus Charité Mitte and Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin , Berlin , Germany
7. Section of Colorectal Surgery, Hospital Italiano de Buenos Aires and Instituto de Medicina Traslacional e Ingeniería Biomédica (IMTIB) , Buenos Aires , Argentina
8. Department of Colorectal Surgery, Beaujon Hospital and University of Paris , Clichy , France
9. Department of Colorectal Surgery, Cliniques Universitaires St-Luc – UCL , Brussels , Belgium
10. Department of Surgery, Leiden University Medical Centre , Leiden , the Netherlands
11. Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, University Surgical Cluster, National University Health System , Singapore
12. A. C. Camargo Cancer Centre , São Paulo , Brazil
13. Division of Colorectal Surgery, Department of Surgery, Medical College of Wisconsin , Milwaukee, WI , USA
14. Department of General Surgery and Specialty, University Federico II of Naples , Naples , Italy
15. Department of Colorectal Surgery, Royal Prince Alfred Hospital , Sydney, New South Wales , Australia
16. Centre for Bowel Diseases , Brzeziny , Poland
17. Surgery Department, Charles University and Central Military Hospital , Prague , Czech Republic
18. Centre for Colorectal Disease, St Vincent’s University Hospital , Dublin , Ireland
19. Department of General and Colorectal Surgery, Medical University , Lodz , Poland
20. Department of Colorectal Surgery, St Mark’s Hospital , London , UK
21. Department of Epidemiology, Epidemiology, Biostatistics and Prevention Institute, University of Zurich , Zurich , Switzerland