1. Department of Otorhinolaryngology and Maxillofacial Surgery, Zealand University Hospital, Køge, Denmark
2. Department of Otolaryngology, Head & Neck Surgery and Audiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
3. Department of Oncology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
4. Department of Otorhinolaryngology, Dronning Ingrids Hospital, Nuuk, Greenland