1. Department of Obstetrics and Gynecology Amsterdam Reproduction and DevelopmentUniversity Medical Center Amterdam, location VU Medical Center Amsterdam The Netherlands
2. Department of Obstetrics and Gynecology University Medical Center Amterdamlocation Academic Medical Center Amsterdam The Netherlands
3. Department of Obstetrics and Gynecology OLVG Amsterdam The Netherlands
4. Department of Obstetrics and Gynecology Maxima Medical Center Veldhoven The Netherlands
5. Department of Obstetrics and Gynecology GROW School for Oncology and Developmental Biology Maastricht University Medical Center Maastricht The Netherlands
6. Department of Obstetrics and Gynecology Catharina Hospital Eindhoven The Netherlands
7. Department of Obstetrics and Gynecology Spaarne Gasthuis Haarlem The Netherlands
8. Department of Biostatistics VU University Amsterdam The Netherlands