1. Center for Research & Development, Uppsala University/ County Council of Gävleborg, Gävle Hospital, Gävle, Sweden
2. Department of Radiation Sciences & Oncology, Umeå University Hospital, Umeå, Sweden
3. Department of Radiology, Gävle Hospital, Gävle, Sweden
4. EpiStat, Uppsala, Sweden
5. Department of Immunology Genetics and Pathology, Section of clinical and experimental oncology, Uppsala University Hospital, Uppsala, Sweden