1. Department of Otorhinolaryngology-Head and Neck Surgery, Odense University Hospital; University of Southern Denmark; Odense
2. Department of Pathology; Odense University Hospital, University of Southern Denmark; Odense
3. Department of Pathology; Copenhagen University Hospital; Copenhagen
4. Department of Otorhinolaryngology-Head and Neck Surgery; Aarhus University Hospital; Aarhus Denmark
5. Odense Patient Data Explorative Network, Odense University Hospital and Department of Clinical Research; University of Southern Denmark; Odense