1. Department of Obstetrics and Gynecology, Gødstrup Hospital, Herning, Denmark
2. NIDO, Centre for Research and Education, Gødstrup Hospital, Herning, Denmark
3. Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
4. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
5. Department of Obstetrics and Gynecology, Aarhus University Hospital, Aarhus, Denmark
6. Department of Biomedicine, Aarhus University, Aarhus, Denmark
7. Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
8. Department of Obstetrics and Gynecology, Odense University Hospital, Odense, Denmark
9. Department of Clinical Research, University of Southern Denmark, Odense, Denmark