1. Department of Obstetrics and Gynecology, University of Brasília (UnB), Brasília-DF, Brazil.
2. Department of Obstetrics, Paulista School of Medicine, Federal University of São Paulo (EPM-UNIFESP), São Paulo-SP, Brazil.
3. Medical Course, Bela Vista Campus, Municipal University of São Caetano do Sul (USCS),
São Paulo-SP, Brazil.