1. Department of High Risk Obstetrics, RPA Women and Babies; Royal Prince Alfred Hospital; Sydney Australia
2. Sydney Ultrasound for Women; Sydney Australia
3. Discipline of Obstetrics, Gynaecology and Neonatology, Faculty of Medicine; University of Sydney; Sydney Australia
4. Heart Centre for Children; Children's Hospital at Westmead; Westmead Australia
5. Discipline of Paediatrics and Child Health, Sydney Medical School; University of Sydney; Sydney Australia