1. Institute for Social Medicine and Epidemiology, Lübeck, Germany
2. Institute for the History of Medicine and Science Studies, University of Lübeck, Lübeck, Germany
3. Gynäkologische Praxisklinik, Hamburg, Germany
4. Klinik Preetz, Preetz, Germany
5. Department of Obstetrics and Gynaecology, Herlev Gentofte, University Hospital, Herlev
6. Department of Obstetrics and Gynaecology, Odense University, Odense, Denmark
7. Hamburg Cancer Registry, Hamburg, Germany