1. Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
2. Department of Surgery, National Hospital of the Faroe Islands, Tórshavn, Faroe Islands
3. Research Unit of the Medical Department, National Hospital of the Faroe Islands, Tórshavn, Faroe Islands
4. Department of Oncology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark