1. Department of Internal Medicine, Division of Medical Oncology, GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands;
2. Department of Radiation Oncology (MAASTRO), GROW – School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands;
3. Department of Clinical Epidemiology and Medical Technology Assessment (KEMTA), Maastricht University Medical Center, Maastricht, The Netherlands;
4. Department of Radiation Oncology, Netherlands Cancer Institute - Antoni van Leeuwenhoek, Amsterdam, The Netherlands;
5. Radiotherapiegroep Arnhem, Arnhem, The Netherlands;
6. Department of Radiotherapy, Nijmegen, The Netherlands;
7. Department of Radiotherapy, University Medical Center Groningen, Groningen, The Netherlands;
8. Department of Clinical Oncology, Leiden University Medical Center, Leiden, The Netherlands;
9. Department of Radiotherapy, University Medical Center Utrecht, Utrecht, The Netherlands;
10. Insituut Verbeeten, Tilburg, The Netherlands;
11. Department of Radiotherapy, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands;
12. Radiotherapiegroep, Deventer, The Netherlands;
13. Department of Radiation Oncology, Amsterdam University Medical Centers, VU University, Amsterdam, The Netherlands;
14. Department of Gastrointestinal Oncology, Netherlands Cancer Institute - Antoni van Leeuwenhoek, Amsterdam, The Netherlands;
15. Department of Medical Oncology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands;
16. Department of Pathology, GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands;
17. Pathology & Data Analytics, Leeds Institute of Medical Research at St James’s, University of Leeds, Leeds, UK;
18. Department of Research, Netherlands Comprehensive Cancer Organization (IKNL), The Netherlands;
19. Department of Public Health, Erasmus Medical Center Rotterdam, Rotterdam, The Netherlands;
20. Department of Surgery, Catharina Hospital Eindhoven, Eindhoven, The Netherlands