1. School of Health, Medical and Applied Science, Medical Sonography Central Queensland University, Melbourne Campus Melbourne Victoria Australia
2. Christopher Kohlenberg Department of Perinatal Ultrasound Nepean Hospital Penrith 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. Allied Health and Human Performance University of South Australia Adelaide South Australia Australia
5. School of Health, Medical and Applied Science, Medical Sonography Central Queensland University, Sydney Campus Sydney New South Wales Australia