1. Department of Molecular Genetics, Erasmus MC Cancer Institute, Dr. Molewaterplein 40, 3015 GD Rotterdam, The Netherlands
2. Department of Radiotherapy, Erasmus MC Cancer Institute, 3015 GD Rotterdam, The Netherlands
3. Holland Proton Therapy Centre (HPTC), Huismansingel 4, 2629 JH Delft, The Netherlands
4. Department of Oral and Maxillofacial Surgery, Erasmus MC Cancer Institute, 3015 GD Rotterdam, The Netherlands
5. Department of Otorhinolaryngology and Head and Neck Surgery, Erasmus MC Cancer Institute, 3015 GD Rotterdam, The Netherlands
6. Department of Pathology, Erasmus MC Cancer Institute, 3015 GD Rotterdam, The Netherlands
7. Department of Experimental Clinical Oncology, Danish Centre for Particle Therapy, Aarhus University Hospital, 8200 Aarhus, Denmark
8. Department of Clinical Medicine, Aarhus University, Nordre Ringgade 1, 8000 Aarhus, Denmark