1. The University of Adelaide; School of Paediatrics and Reproductive Health, Discipline of Obstetrics and Gynaecology; Women's and Children's Hospital 72 King William Road Adelaide South Australia Australia 5006
2. The University of Auckland; Liggins Institute; Private Bag 92019 85 Park Road Auckland New Zealand
3. The University of Adelaide; ARCH: Australian Research Centre for Health of Women and Babies, The Robinson Institute, Discipline of Obstetrics and Gynaecology; Women's and Children's Hospital 72 King William Road Adelaide South Australia Australia 5006
4. Materno Perinatal Institute of Lima-Peru; Adolescence Unit; Jr. Miroquezada No 947 Lima 01 Peru
5. Oregon Health and Science University; Departments of Obstetrics and Gynecology, and Medical Informatics and Clinical Epidemiology; Portland Oregon USA
6. La Trobe University; Faculty of Health Sciences; Bundoora VIC Australia 3086