1. Department of Obstetrics and Gynecology Leiden University Medical Center Leiden the Netherlands
2. Department of Obstetrics and Gynecology Isala Hospital Zwolle the Netherlands
3. Department of Anesthesiology Wilhelmina Children’s Hospital Utrecht the Netherlands
4. Division Woman and Baby Department of Obstetrics Birth Center Wilhelmina’s Children Hospital University Medical Center Utrecht Utrecht the Netherlands
5. Department of Obstetrics and Gynecology Tergooi Blaricum the Netherlands
6. Department of Obstetrics and Gynecology Erasmus MC University Medical Center Rotterdam the Netherlands
7. Department of Obstetrics and Gynecology Catharina Ziekenhuis Eindhoven the Netherlands
8. Department of Obstetrics and Gynecology Amsterdam UMC Vrije Universiteit Amsterdam Amsterdam the Netherlands
9. Department of Health Sciences Global Health University Medical Center Groningen University of Groningen Groningen the Netherlands
10. Department of Obstetrics and Gynecology Leeuwarden Medical Center Leeuwarden the Netherlands
11. Department of Obstetrics and Gynecology Deventer Hospital Deventer the Netherlands
12. Athena Institute, VU Amsterdam the Netherlands