1. School of Women's and Children's Health University of New South Wales Sydney NSW Australia
2. National Perinatal Epidemiology and Statistics Unit Centre for Big Data Research in Health and School of Women's and Children's Health University of New South Wales Sydney NSW Australia
3. Unit for Human Reproduction 1st Department of Obstetrics and Gynaecology, Medical School Aristotle University of Thessaloniki Thessaloniki Greece
4. IVF Australia South Sydney, Sydney NSW Australia