1. Department of Physics, Medical Radiation Physics, Stockholm University, Stockholm, Sweden
2. Department of Oncology and Pathology, Medical Radiation Physics, Karolinska Institutet, Stockholm, Sweden
3. The Skandion Clinic, Uppsala, Sweden
4. Medical Radiation Sciences, Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
5. Danish Centre for Particle Therapy, Aarhus, Denmark