1. Department of Obstetrics and Gynecology; University of Amsterdam; Academic Medical Center; the Netherlands
2. Department of child health/Life Style; TNO; Leiden the Netherlands
3. Royal Organisation of Midwives; Utrecht the Netherlands
4. Clinical Research Unit; University of Amsterdam; Academic Medical Center; Amsterdam the Netherlands
5. The Robinson Institute; School of Paediatrics and Reproductive Health; University of Adelaide; Adelaide SA Australia