1. Department of Head and Neck Oncology and SurgeryNetherlands Cancer Institute Amsterdam the Netherlands
2. Department of Oral‐Maxillofacial Surgery, Amsterdam UMCUniversity of Amsterdam Amsterdam the Netherlands
3. Department of Otorhinolaryngology Head and Neck Surgery and AudiologyRigshospitalet, Copenhagen University Hospital Copenhagen Denmark
4. Department of Otorhinolaryngology and Maxillofacial SurgeryZealand University Hospital Køge Denmark
5. Department of PathologyRigshospitalet, Copenhagen University Hospital Copenhagen Denmark
6. Scientific Information Service, Netherlands Cancer Institute Amsterdam the Netherlands
7. Department of Head and Neck SurgeryUniversity College Hospitals London UK