Affiliation: | 1. Department of Radiotherapy and Experimental Cancer Research, Ghent University Hospital, Ghent, Belgium;2. Department of Nuclear Medicine, Ghent University Hospital, Ghent, Belgium;3. Department of Radiation Oncology, University Hospital Zurich, Zurich, Switzerland;4. Department of Head, Neck and Maxillo‐Facial Surgery, Ghent University Hospital, Ghent, Belgium |