1. Referral Center for Teaching of Diagnostic Imaging (CETRUS); São Paulo SP Brazil
2. Department of Obstetrics; Federal University of São Paulo (UNIFESP); São Paulo SP Brazil
3. Department of Gynecology and Obstetrics, Baylor College of Medicine; Texas Children's Hospital; Houston TX USA
4. Department of Obstetrics and Gynecology, Ribeirão Preto School of Medicine; University of São Paulo (DGO-FMRP-USP); Ribeirão Preto SP Brazil