1. Perth Radiology Clinic Mirrabooka Western Australia Australia
2. Medical Sonography, School of Health, Medical and Applied Science Central Queensland University Perth Western Australia Australia
3. Discipline of Obstetrics, Gynaecology and Neonatology, Sydney Medical School Nepean University of Sydney, Nepean Hospital Penrith Penrith New South Wales Australia
4. Christopher Kohlenberg Department of Perinatal Ultrasound Nepean Hospital Penrith New South Wales Australia
5. Maternal Fetal Medicine Unit Mater Mothers' Hospitals, Raymond Terrace South Brisbane Queensland Australia
6. Maternal Fetal Medicine Department Royal Brisbane and Women's Hospital Herston Queensland Australia