1. Unit of Virus, Lifestyle and Genes; Danish Cancer Society Research Center; Copenhagen Denmark
2. Unit of Statistics and Pharmacoepidemiology; Danish Cancer Society Research Center; Copenhagen Denmark
3. Department of Gynaecology; Rigshospitalet, University of Copenhagen; Copenhagen Denmark
4. Clinical Pharmacology and Pharmacy; Department of Public Health, University of Southern Denmark; Odense Denmark
5. Department of Public Health; University of Copenhagen, Copenhagen, and Department of Clinical Epidemiology, Faculty of Health, Aarhus University Hospital; Denmark Aarhus