1 Virus, Lifestyle and Genes, Danish Cancer Society Research Center, DK-2100 Copenhagen, Denmark. Electronic address: mariehar@cancer.dk.
2 Virus, Lifestyle and Genes, Danish Cancer Society Research Center, DK-2100 Copenhagen, Denmark.
3 Statistics and Pharmacoepidemiology, Danish Cancer Society Research Center, DK-2100 Copenhagen, Denmark.
4 Childhood Cancer Research Group, Danish Cancer Society Research Center, DK-2100 Copenhagen, Denmark; Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.
5 Department of Paediatrics and Adolescent Medicine, Juliane Marie Centre, Rigshospitalet, Copenhagen, Denmark; Institute of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark.
6 Virus, Lifestyle and Genes, Danish Cancer Society Research Center, DK-2100 Copenhagen, Denmark; Department of Gynaecology, Rigshospitalet, Copenhagen, Denmark.