1. Department of Surgery, Leiden University Medical Centre, Leiden, the Netherlands
2. Department of Surgery, Cancer Centre Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
3. Department of Surgery, Jeroen Bosch Hospital, Den Bosch, the Netherlands
4. Department of Surgery, Maastricht University Medical Centre, Maastricht, the Netherlands
5. Department of Surgery, Erasmus Medical Centre, Rotterdam, the Netherlands
6. Department of Surgery, Maasstad Hospital, Rotterdam, the Netherlands
7. Department of Surgery, Catharina Hospital, Eindhoven, the Netherlands
8. Department of Epidemiology, GROW—School for Oncology and Developmental Biology, Maastricht UMC+, Maastricht, the Netherlands
9. Department of Surgery, Onze Lieve Vrouwe Gasthuis (loc. Oost), Amsterdam, the Netherlands
10. Department of Surgery, Medisch Spectrum Twente, Enschede, the Netherlands
11. Department of Surgery, University of Groningen and University Medical Centre Groningen, Groningen, the Netherlands
12. Department of Surgery, UMC Utrecht Cancer Centre, St Antonius Hospital Nieuwegein; Regional Academic Cancer Centre Utrecht, Utrecht, the Netherlands
13. Department of Surgery, Isala, Zwolle, the Netherlands
14. Department of Surgery, Reinier de Graaf Gasthuis, Delft, the Netherlands
15. Department of Surgery, Amphia Hospital, Breda, the Netherlands
16. Department of Surgery, Tjongerschans Hospital, Heerenveen, the Netherlands
17. Department of Surgery, Cancer Centre Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
18. Department of Internal Medicine, Division of Medical Oncology, GROW—School for Oncology and Developmental Biology, Maastricht UMC+, Maastricht, the Netherlands
19. Department of Radiology, Leiden University Medical Centre, Leiden, the Netherlands
20. Department of Surgery, Radboud University Medical Centre, Nijmegen, the Netherlands