1. Department of Gastrointestinal Surgery, Stavanger University Hospital, Stavanger, Norway
2. Department of Clinical Medicine, University of Bergen, Bergen, Norway
3. Department of Surgery, Sunnybrook and University of Toronto, Toronto, Ontario, Canada
4. Department of Surgery, University of Chicago, Chicago, Illinois, USA
5. Department for General, Visceral and Transplant Surgery, Frankfurt University Hospital, Goethe University, Frankfurt/Main, Germany
6. Department of Transplantation Medicine, Oslo University Hospital, Oslo, Norway
7. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
8. Department of Surgery, Chinese University of Hong Kong, Hong Kong, China
9. Department of Surgery, Hospital Clinico San Carlos, Madrid, Spain
10. Department of Surgery, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Istituto Nazionale Tumori, Milan, Spain
11. City of Hope Comprehensive Cancer Center, Duarte, California, USA
12. Melbourne School of Public Health, University of Melbourne, Melbourne, Victoria, Australia
13. Institute of Surgery, St Luke's Medical Centre, Metro Manila, Philippines
14. Department of Surgery, Makati Medical Centre, Makati, Philippines
15. Department of General Surgery, National Kidney and Transplant Institute, Quezon City, Philippines
16. Department of Critical Care Medicine, University of Calgary, Calgary, Alberta, Canada
17. Program in Global Surgery and Social Change, Harvard Medical School, Boston, Massachusetts, USA
18. Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston, Massachusetts, USA
19. Lund University WHO Collaborating Centre for Surgery and Public Health, Paediatric Surgery, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
20. General Surgery Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Catholic University, Rome, Italy