1. Department of Obstetrics and Gynecology, Universidade Federal do Rio Grande do Norte, Natal-RN, Brazil.
2. Department of Toxicology and Clinical Analysis, Universidade Federal do Rio Grande do Norte, Natal-RN, Brazil.
3. Section of Clinical Cytology, Department of Clinical Analysis and Biomedicine, Universidade Estadual de Maringá, Maringa-PR, Brazil.
4. Department of Obstetrics and Gynecology, Universidade Federal do Ceará, Fortaleza-CE, Brazil.
5. Department of Obstetrics and Gynecology, Universidade Estadual de Campinas, Campinas-SP, Brazil.