1. Department of Obstetrics, Paulista School of Medicine–Federal University of São Paulo, São Paulo, SP, Brazil
2. Department of Obstetrics and Gynecology, Medical Science College of Santos, Santos, SP, Brazil
3. Department of Gynecology and Obstetrics, Federal University of Triângulo Mineiro, Uberaba, MG, Brazil
4. Gynecology and Obstetrics Service, Mário Palmério University Hospital, University of Uberaba, Uberaba, MG, Brazil