1. Department of Obstetrics and Gynecology; Academic Medical Center; Amsterdam the Netherlands
2. Department of Obstetrics and Gynecology; VU Medical Center; Amsterdam the Netherlands
3. Clinical Research Unit; University of Amsterdam; Academic Medical Center; Amsterdam the Netherlands
4. Department of Obstetrics and Gynecology; Leeuwarden Medical Center; Leeuwarden the Netherlands
5. Department of Obstetrics and Gynecology; Radboud University Medical Center; Nijmegen the Netherlands
6. Department of Obstetrics and Gynecology; Grow-School for Oncology and Developmental Biology; Maastricht University; Maastricht the Netherlands
7. Department of Obstetrics and Gynecology; Groene Hart Hospital; Gouda the Netherlands
8. Department of Obstetrics and Gynecology; Sint Franciscus Gasthuis; Rotterdam the Netherlands
9. The Robinson Research Institute; School of Pediatrics and Reproductive Health; University of Adelaide and The South Australian Health and Medical Research Institute; Adelaide Australia
10. Department of Health Sciences; Faculty of Earth and Life Sciences; Free University Amsterdam; Amsterdam Public Health Research Institute; Amsterdam the Netherlands