1. Danish Cancer Institute, Danish Cancer Society, Copenhagen, Denmark
2. Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
3. Department of Pediatrics and Adolescent Medicine, University Hospital Rigshospitalet, Copenhagen, Denmark
4. Department of Public Health, University of Copenhagen, Copenhagen, Denmark
5. Harvard T.H. Chan School of Public Health, Boston, Massachusetts
6. University of the Faroe Islands, Torshavn, Faroe Islands
7. Institute of Clinical Medicine, Faculty of Medicine, University of Copenhagen, Copenhagen, Denmark
8. Department of Hematology, University Hospital Rigshospitalet, Copenhagen, Denmark