1. Dutch Institute for Clinical Auditing, Leiden University Medical Centre, Leiden, The Netherlands
2. Department of General Surgery, Leiden University Medical Centre, Leiden, The Netherlands
3. Department of General Surgery, Academic Medical Centre, Amsterdam, The Netherlands
4. Department of Medical Oncology, St Antonius Hospital, Nieuwegein, The Netherlands
5. Department of Radiation Oncology, Institute Verbeeten, Tilburg, The Netherlands
6. Department of General Surgery, Erasmus Medical Centre, Rotterdam, The Netherlands
7. Department of General Surgery, University Medical Centre Utrecht, Utrecht, The Netherlands
8. Department of Surgical Oncology, The Netherlands Cancer Institute/Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
9. Department of Surgery, Jeroen Bosch Hospital, ’s-Hertogenbosch, The Netherlands
10. Department of Medical Oncology, Netherlands Cancer Institute/Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
11. Department of Surgery, Leiden University Medical Centre, Leiden, The Netherlands
12. Department of Pathology, VU University Medical Centre, Amsterdam, The Netherlands
13. Department of Public Health, Erasmus University Medical Centre, Rotterdam, The Netherlands
14. Netherlands Comprehensive Cancer Organization, Eindhoven, The Netherlands
15. Department of Surgery, Catherina Hospital, Eindhoven, The Netherlands
16. Department of Surgery, University Medical Centre Groningen, Groningen, The Netherlands
17. Department of Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands
18. Department of Gastroenterology and Hepatology, Radboud University Medical Centre, Nijmegen, The Netherlands
19. Department of Surgery, IJselland Hospital, Capelle aan den IJsel, The Netherlands
20. Department of Radiotherapy, Netherlands Cancer Institute/Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands