1. Imaging Division, Department of Radiation Oncology, University Medical Center Utrecht Utrecht University Utrecht The Netherlands
2. Department of Oral and Maxillofacial Surgery and Special Dental Care, Department of Head and Neck Surgical Oncology, University Medical Center Utrecht Utrecht University Utrecht The Netherlands
3. Department of Oral Biochemistry Academic Centre for Dentistry Amsterdam (ACTA) Amsterdam The Netherlands
4. Department of Head and Neck Surgical Oncology, University Medical Center Utrecht Utrecht University Utrecht The Netherlands