1. Department of Obstetrics and Gynaecology; IJsselland Ziekenhuis; Capelle aan den Ijssel the Netherlands
2. Department of Obstetrics and Gynaecology; Maasstad Ziekenhuis; Rotterdam the Netherlands
3. Department of Obstetrics and Gynaecology; Academisch Medisch Centrum; Amsterdam the Netherlands
4. Department of Obstetrics and Gynaecology; Erasmus Medisch Centrum; Rotterdam the Netherlands
5. Department of Obstetrics and Gynaecology; Universitair Medisch Centrum Groningen; Groningen the Netherlands
6. Department of Obstetrics and Gynaecology; Leids Universitair Medisch Centrum; Leiden the Netherlands
7. Department of Obstetrics and Gynaecology; Radboud Universitair Medisch Centrum; Nijmegen the Netherlands
8. Department of Obstetrics and Gynaecology; Isala Ziekenhuis; Zwolle the Netherlands
9. Department of Obstetrics and Gynaecology; Universitair Medisch Centrum Utrecht; Utrecht the Netherlands
10. Department of Paediatrics; Erasmus Medisch Centrum; Rotterdam the Netherlands
11. Department of Obstetrics and Gynaecology; Maxima Medisch Centrum; Veldhoven the Netherlands
12. Department of Obstetrics and Gynaecology; Maastricht Universitair Medisch Centrum; Maastricht the Netherlands
13. School of Paediatrics and Reproductive Health; University of Adelaide; Adelaide SA Australia
14. Department of Obstetrics and Gynaecology; VU Universitair Medisch Centrum; Amsterdam the Netherlands
15. Department of Obstetrics and Gynaecology; Jeroen Bosch Ziekenhuis; ‘s-Hertogenbosch the Netherlands