1. Department of Physics, Faculty of Mathematics and Natural Sciences, University of Oslo, Oslo, Norway
2. Institute of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway
3. Department of Medical Physics, Cancer Clinic, Oslo University Hospital, Oslo, Norway
4. Danish Centre for Particle Therapy, Aarhus University Hospital, Aarhus, Denmark
5. Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
6. Department of Health Technology, Technical University of Denmark, Roskilde, Denmark
7. Department of Pathology, Oslo University Hospital, Oslo, Norway