1. Department of Otorhinolaryngology—Head and Neck Surgery University of Helsinki and HUS Helsinki University Hospital Helsinki Finland
2. Finnish Cancer Registry Institute for Statistical and Epidemiological Cancer and Research Helsinki Finland
3. Cancer and Translational Medicine Unit University of Oulu Oulu Finland
4. Medical Research Unit, Oral and Maxillofacial Diseases University of Helsinki and Haartman Institute Helsinki Finland
5. Research Program in Systems Oncology, Faculty of Medicine University of Helsinki Helsinki Finland
6. Division of Ear, Nose and Throat Diseases, Department of Clinical Sciences, Intervention and Technology Karolinska Institutet and Karolinska Hospital Stockholm Sweden
7. Faculty of Social Sciences University of Tampere Tampere Finland
8. Department of Public Health, School of Medicine University of Helsinki Helsinki Finland