[1] University of Helsinki,Department of Otorhinolaryngology—Head and Neck Surgery
[2] HUS Helsinki University Hospital,Finnish Cancer Registry,
[3] Institute for Statistical and Epidemiological Cancer and Research,Division of Ear, Nose and Throat Diseases, Department of Clinical Sciences, Intervention and Technology
[4] Karolinska Institutet and Karolinska Hospital,Research Program in Systems Oncology, Faculty of Medicine
[5] University of Helsinki,Department of Pathology
[6] University of Helsinki,Nykøbing Falster Hospital
[7] HUS Helsinki University Hospital,Institute of Environmental Medicine
[8] Danish Cancer Society Research Center,Institute of Health and Society
[9] University of Copenhagen,Centre of Public Health Sciences, Faculty of Medicine
[10] IMM Karolinska Institutet,Cancer and Translational Medicine Unit, Medical Research Unit
[11] National Institute of Occupational Health (STAMI),Oral and Maxillofacial Diseases
[12] University of Oslo,Health Sciences Unit, Faculty of Social Sciences
[13] Icelandic Cancer Registry,undefined
[14] University of Iceland,undefined
[15] University of Oulu,undefined
[16] Oulu University Hospital,undefined
[17] University of Helsinki,undefined
[18] and Haartman Institute,undefined
[19] Tampere University,undefined