Affiliation: | 1. Department of Otorhinolaryngology – Head and Neck Surgery, University of Gothenburg, Sahlgrenska University Hospital, G?teborg, Sweden;2. Department of Oncology, Sahlgrenska University Hospital, G?teborg, Sweden;3. Department of Otorhinolaryngology, NU Hospital Group, Trollh?ttan, Sweden;4. Department of Otorhinolaryngology, Central Hospital, Sk?vde, Sweden |