1. School of Women’s and Children’s Health, UNSW Medicine, UNSW, Sydney, Australia;
2. Department of Women’s and Children’s Health, St. George Hospital, Sydney, Australia;
3. Department of Maternal Fetal Medicine, Royal Hospital for Women, Sydney, Australia;
4. Royal Prince Alfred Hospital, Camperdown, Sydney, Australia;
5. Department of Obstetrics and Gynaecology, College of Medicine, King Saud University, Riyadh, Saudi Arabia;
6. Maternal Fetal Medicine, King Khalid University Hospital, Riyadh, Saudi Arabia