1. Department of Clinical Research for Women, Femicare VZW, Tienen, Belgium
2. Department of Obstetrics and Gynecology, University Hospital, University of Antwerp, Antwerp, Belgium
3. Department of Clinical Sciences at Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden
4. Department of Obstetrics and Gynecology, Danderyd Hospital, Stockholm, Sweden
5. Department of Obstetrics and Gynecology, Foothills Hospital, University of Calgary, Calgary, Alberta, Canada
6. Statistics and Methodology, ZEG – Berlin Center for Epidemiology and Health Research GmbH, Berlin, Germany
7. Medical Affairs, Bayer AG, Berlin, Germany
8. Department of Obstetrics and Gynecology, Methodist Dallas Medical Center, Dallas, TX, USA