1. Department of Radiation Oncology, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
2. Department of Surgery, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
3. Clinical Research Department, Comprehensive Cancer Organisation the Netherlands (IKNL) Nijmegen, the Netherlands
4. Department of Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
5. Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands
6. Department of Radiation Oncology (MAASTRO), GROW School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
7. Department of Medical Oncology, Catharina Hospital, Eindhoven, the Netherlands
8. Department of Surgery, Maastricht University Medical Center, Maastricht, the Netherlands
9. Department of General, Visceral and Transplant Surgery, University Hospital Aachen, Aachen, Germany
10. GROW – School for Oncology and Developmental Biology, Maastricht University, the Netherlands
11. Department of Medical Oncology, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
12. Department of Surgery, OLVG, Amsterdam, the Netherlands
13. Department of Medical Oncology, Isala Oncology Center, Zwolle, the Netherlands
14. Department of Surgery, Catharina Hospital, Eindhoven, the Netherlands
15. Department of Gastroenterology and Hepatology, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
16. Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, the Netherlands
17. Department of Medical Oncology, OLVG, Amsterdam, the Netherlands
18. Department of Medical Oncology, Leiden University Medical Center, Leiden, the Netherlands
19. Department of Radiation Oncology, Leiden University Medical Center, Leiden, the Netherlands
20. Department of Radiation Oncology, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
21. Department of Radiation Oncology, Isala Oncology Center, Zwolle, the Netherlands
22. Department of Surgery, Isala Oncology Center, Zwolle, the Netherlands
23. Department of Radiation Oncology, Catharina Hospital, Eindhoven, the Netherlands
24. Department of Internal Medicine, Division of Medical Oncology, GROW—School for Oncology and Developmental Biology, Maastricht UMC+, Maastricht, the Netherlands
25. Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
26. Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
27. Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Centre, Utrecht University, the Netherlands