1. Department of Medical Radiation Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
2. Department of Medical Physics, County Hospital Ryhov, Jönköping, Sweden
3. Department of Therapeutic Radiation Physics, Sahlgrenska University Hospital, Gothenburg, Sweden
4. Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden
5. Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden