1. Department of Obstetrics, Paulista School of Medicine, Federal University of São Paulo (EPM-UNIFESP), São Paulo, Brazil;
2. Department of Imaging Diagnostic, Tudu Maternity Hospital, Ho Chi Minh City, Vietnam;
3. Monash Ultrasound for Women, Melbourne, Victoria, Australia;
4. Department of Obstetrics and Gynaecology, Monash University, Clayton, Victoria, Australia