1. School of Medical and Applied Science, Medical Sonography Central Queensland University, Sydney Campus Sydney New South Wales Australia
2. South Western Sydney Obstetric Research Unit Liverpool Hospital Sydney New South Wales Australia
3. Discipline of Obstetrics, Gynaecology and Neonatology, Nepean Medical School, Faculty of Medicine and Health, Nepean Hospital The University of Sydney Sydney New South Wales Australia
4. Department of Obstetric and Gynaecological Imaging Tara Imaging for Women Campbelltown New South Wales Australia
5. Medical Sonography, School of Medical and Applied Science Central Queensland University Sydney New South Wales Australia
6. Medical Sonography, School of Health, Medical and Applied Sciences Central Queensland University Sydney New South Wales Australia
7. Discipline of Obstetrics, Gynaecology and Neonatology, Sydney Medical School Nepean University of Sydney, Nepean Hospital Penrith Sydney New South Wales Australia