1. Sydney Ultrasound for Women, Bondi Junction, Australia;
2. Department of Obstetrics and Gynaecology, University of New South Wales, Sydney, Australia;
3. Monash Ultrasound for Women, The Epworth Centre, Richmond, Australia;
4. Women’s Ultrasound Melbourne, Parkville, Australia;
5. Pregnancy Research Centre, Department of Obstetrics and Gynaecology, University of Melbourne, Melbourne, Australia;
6. Department of Medicine and Radiology, University of Melbourne, Melbourne, Australia;
7. School of Health Sciences, University of Canterbury, Christchurch, New Zealand;
8. School of Nursing, Midwifery and Social Work, University of Queensland, Brisbane, Australia;
9. Department of Obstetrics and Gynaecology, Monash University, Clayton, Australia;
10. Discipline of Obstetrics, Gynaecology and Neonatology, University of Sydney, Sydney, Australia