1. Cancer Registry of Norway, Institute of Population‐based Cancer ResearchOslo Norway
2. Norwegian Centre for Migrant and Minority Health ResearchOslo Norway
3. Department of Community MedicineUniversity of Tromsø, The Arctic University of NorwayTromsø Norway
4. Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholm Sweden
5. Genetic Epidemiology Group, Folkhalsän Research CenterHelsinki Finland
6. Department of Preventive Medicine, Keck School of MedicineUniversity of Southern CaliforniaLos Angeles CA
7. Department of NutritionInstitute of Basic Medical Sciences, University of OsloOslo Norway