1. Department of Obstetrics and Gynaecology University of Melbourne Melbourne VictoriaAustralia
2. Victorian Assisted Reproductive Treatment Authority Melbourne Victoria Australia
3. Department of Obstetrics and Gynaecology University of Auckland Auckland New Zealand
4. Department of Obstetrics and Gynaecology Monash University Melbourne VictoriaAustralia
5. Public Health and Preventive Medicine Monash University Melbourne Victoria Australia