1. Uppsala University, Uppsala; Karolinska Institutet, Stockholm, Sweden
2. University Medical Center Maastricht, Maastricht, the Netherlands
3. Karolinska University Hospital, Solna; Karolinska Institutet, Stockholm, Sweden
4. The Royal Marsden National Health Service Foundation Trust, Sutton, United Kingdom
5. Radboud University Nijmegen Medical Center, Nijmegen, the Netherlands
6. Uppsala University, Uppsala, Sweden
7. Leeds Institute of Molecular Medicine, University of Leeds, Leeds, United Kingdom
8. Cattedra di Radioterapia, Università Cattolica del Sacro Cuore, Rome, Italy
9. Leiden University Medical Center, Leiden, the Netherlands