1. Department of Head and Neck Surgical Oncology, UMC Utrecht Cancer CenterUniversity Medical Center Utrecht Utrecht The Netherlands
2. Department of Otolaryngology‐Head and Neck SurgeryVU University Medical Center Amsterdam The Netherlands
3. Department of Oral and Maxillofacial Surgery / Oral PathologyVU University Medical Center/Academic Center for Dentistry (ACTA) Amsterdam Amsterdam The Netherlands
4. Department of Nuclear MedicineUniversity Medical Center Utrecht Utrecht The Netherlands
5. Department of PathologyUniversity Medical Center Utrecht Utrecht The Netherlands
6. Department of PathologyVU University Medical Center Amsterdam The Netherlands