1. Department of Obstetrics, Paulista School of Medicine; Federal University of São Paulo (EPM-UNIFESP); São Paulo SP Brazil
2. Department of Obstetrics and Gynecology, Guastalla Civil Hospital; AUSL Reggio Emilia; Italy
3. Department of Obstetrics and Gynecology, Ribeirão Preto School of Medicine; São Paulo University (FMRP-USP); Ribeirão Preto SP Brazil