1. Department of Oncology, Oslo University Hospital, Oslo, Norway
2. Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, Oslo University Hospital, Oslo, Norway
3. Skandion Clinic, Uppsala, Sweden
4. Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
5. North Estonia Medical Centre, Tallinn, Estonia
6. Karolinska University Hospital, Stockholm, Sweden
7. Skåne University Hospital, Lund, Sweden
8. Sahlgrenska University Hospital, Gothenburg, Sweden
9. Haukeland University Hospital, Bergen, Norway
10. Department of Physics, University of Oslo, Oslo, Norway
11. Danish Center for Particle Therapy, Aarhus University Hospital, Denmark