1. 1Department of Otorhinolaryngology, Head and Neck Surgery & Audiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
2. 2Department of Pathology, Naestved Hospital, Næstved, Denmark.
3. 3Department of Oncology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
4. 4Department of Pathology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.