1. Royal Free London NHS Foundation Trust and UCL Division of Surgery and Interventional Science London UK
2. Netherlands Cancer Institute Amsterdamthe Netherlands
3. Maastricht University Medical Center Maastricht the Netherlands
4. Princess Margaret Hospital Toronto ON Canada
5. University of Groningen University Medical Center Groningen the Netherlands
6. University of Montreal Hospital Center Montreal QC Canada
7. Saint Antonius Hospital Nieuwegein the Netherlands
8. QEII Health Sciences Center Halifax NS Canada
9. Radboud University Hospital Nijmegen the Netherlands
10. Ghent University Hospital GhentUK
11. South West Wales Cancer Centre and Swansea University College of Medicine Swansea UK
12. University Medical Centers Amsterdam the Netherlands
13. Barts and Queen Mary University London London UK
14. European Organisation of Research and Treatment of Cancer (EORTC) Brussels Belgium
15. Cliniques Universitaires Saint‐Luc Brussels Belgium