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