1. Obstetrics and Gynecology Residency Program Ribeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoBrazil
2. Department of Cell and Molecular Biology and Pathogenic Bioagents, Ribeirao Preto Medical School University of Sao Paulo Ribeirao Preto Brazil
3. Department of Social Medicine, Ribeirao Preto Medical School University of Sao Paulo Ribeirao Preto Brazil