1. Department of General Pathology; Federal University of Minas Gerais, Belo Horizonte; Minas Gerais Brazil
2. Department of Obstetrics and Gynecology; Faculty of Medicine, Federal University of Minas Gerais, Belo Horizonte; Minas Gerais Brazil
3. Department of Obstetrics and Gynecology; Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto; São Paulo Brazil