1. Department of Obstetrics and Gynecology; Academic Medical Center; University of Amsterdam; Amsterdam the Netherlands
2. Department of Child Health; TNO Netherlands Organization for Applied Scientific Research; Leiden the Netherlands
3. Royal Dutch Organization for Midwives; Utrecht the Netherlands
4. Clinical Research Unit; Academic Medical Center; University of Amsterdam; Amsterdam the Netherlands
5. Robinson Institute; School of Paediatrics and Reproductive Health; University of Adelaide; Adelaide South Australia Australia
6. Department of Life Style; TNO Netherlands Organization for Applied Scientific Research; Leiden the Netherlands