1. Department of EpidemiologyUniversity of TampereTampere Finland
2. Cancer Registry of Norway, Department of Research, Institute of Population‐Based Cancer ResearchOslo Norway
3. Department of Community Medicine, Faculty of Health SciencesUniversity of Tromsø, The Arctic University of NorwayTromsø Norway
4. Genetic Epidemiology Group, Folkhälsan Research CenterHelsinki Finland
5. Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholm Sweden
6. Icelandic Cancer RegistryReykjavik Iceland
7. Faculty of MedicineUniversity of IcelandReykjavik Iceland
8. Center for Epidemiology and Screening, Institute of Public Health, University of CopenhagenCopenhagen Denmark
9. Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer ResearchHelsinki Finland