1. Department of Medical Oncology, Ghent University Hospital, Ghent, Belgium
2. Department of Head and Neck Surgery, Ghent University Hospital, Ghent, Belgium
3. Department of Radiation Oncology, Ghent University Hospital, Ghent, Belgium
4. Department of Oral and Maxillofacial Surgery, AZ Sint-Augustinus Veurne, Veurne, Belgium
5. Department of Pathology, Cancer Research Institute Ghent, Ghent University and Ghent University Hospital, Ghent, Belgium
6. Department of Medical Oncology, Department of Drug Research Unit Ghent, Cancer Research Institute Ghent, Ghent University and Ghent University Hospital, Ghent, Belgium