1. Department of Otorhinolaryngology – Head and Neck Surgery, University of Helsinki and HUS Helsinki University Hospital, Helsinki, Finland
2. Department of Otorhinolaryngology – Head and Neck Surgery, Turku University Hospital, Turku, Finland
3. Department of Pathology, HUSLAB, University of Helsinki and HUS Helsinki University Hospital, Helsinki, Finland
4. Division of Ear, Nose and Throat Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet and Karolinska Hospital, Stockholm, Sweden
5. Research Program in Systems Oncology, Faculty of Medicine, University of Helsinki, Helsinki, Finland