1. Department of Obstetrics and Gynecology, Faculty of Medical Sciences, State University of Campinas-UNICAMP Campinas, São Paulo, Brazil
2. Department of Obstetrics and Gynecology, Federal University of Rio Grande do Sul–UFRGS, Rio Grande do Sul, Brazil
3. Department of Gynecology and Obstetrics, Jundiai School of Medicine, Jundiai, Brazil
4. Department of Gynecology and Obstetrics, ABC School of Medicine, Santo Andre, Brazil
5. Department of Gynecology and Obstetrics, Botucatu School of Medicine UNESP-Sao Paulo State University, Botucatu, Brazil
6. Paulista Center for Clinical Research-CEPIC, Sao Paulo, Brazil
7. Department of Gynecology and Obstetrics, PUC-RS, Porto Alegre, Brazil
8. Department of Clinical Research, Libbs Farmacêutica Ltda, Sao Paulo, Brazil