1. Department of Midwifery Science; AVAG and the EMGO Institute of Health and Care Research; VU University Medical Centre; Amsterdam the Netherlands
2. Department of Obstetrics and Gynaecology; Amsterdam Medical Centre; Amsterdam the Netherlands
3. School of Paediatrics and Reproductive Health; University of Adelaide; Adelaide SA Australia
4. University of Leiden; Leiden the Netherlands
5. Department of Obstetrics and Gynaecology; GROW School for Oncology and Developmental Biology; Maastricht University Medical Centre; Maastricht the Netherlands