1. Department of Clinical Science, Intervention and Technology Karolinska Institutet Stockholm Sweden
2. Division of Infections and Cancer Epidemiology Deutsches Krebsforschungszentrum (DKFZ) Heidelberg Germany
3. Finnish Cancer Center Mid Tampere Finland
4. Finnish Cancer Registry Helsinki Finland
5. Finnish Maternity Cohort, University of Oulu Oulu Finland
6. European Scientific Infra‐structure Services (ESIS) Oulu Finland
7. Department of Otorhinolaryngology – Head and Neck Surgery, Research Program in Systems Oncology University of Helsinki and Helsinki University Hospital Helsinki Finland
8. Division of Ear, Nose and Throat Diseases, Department of Clinical Sciences, Intervention and Technology Karolinska Institutet and Karolinska University Hospital Stockholm Sweden