1. Department of Oncology, Odense University Hospital, Odense, Denmark;
2. Institute of Clinical Research, University of Southern Denmark, Odense, Denmark;
3. Laboratory of Radiation Physics, Odense University Hospital, Odense, Denmark;
4. Department of Oral and Maxillofacial Surgery, Centre for Head and Orthopedics, Copenhagen University Hospital, Copenhagen, Denmark;
5. Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark