1. University of Melbourne; Department of Obstetrics and Gynaecology; The Royal Women's Hospital Locked Bag 300, 20 Flemington Rd Parkville Victoria Australia 3052
2. The University of Adelaide; ARCH: Australian Research Centre for Health of Women and Babies, Discipline of Obstetrics and Gynaecology; Women's and Children's Hospital 72 King William Road Adelaide South Australia Australia 5006
3. University Hospital, Rouen; Department of Neonatal Medicine; Rue de Germont, 1, 76031 Rouen cedex France
4. The University of Alabama; Center for Women's Reproductive Health; Birmingham Alabama USA