1. Department of Perinatal Medicine, The Royal Women’s Hospital, Cnr Grattan Street and Flemington Road, Parkville, VIC 3052, Australia
2. Department of Obstetrics and Gynaecology, The University of Melbourne, Parkville, VIC 3010, Australia
3. Monash Ultrasound for Women, 15 Murray Street, Clayton, VIC 3170, Australia