1. Otorhinolaryngology, Head and Neck Surgery and Department of Oncology, Section Head and Neck Oncology, University Hospitals Leuven, Leuven, Belgium;
2. Department of Oncology, Section Head and Neck Oncology, KU Leuven, Leuven, Belgium;
3. Department of Radiology, University Hospitals Leuven, Leuven, Belgium