[1] Univ Fed Rio Grande do Norte, Dept Ciencias Saude, BR-59072970 Natal, RN, Brazil
[2] Univ Fed Rio Grande do Norte, MEJC, BR-59072970 Natal, RN, Brazil
[3] Univ Fed Paraiba, Dept Tocoginecol, BR-58059900 Joao Pessoa, Paraiba, Brazil
[4] Univ Fed Rio Grande do Norte, Dept Tocoginecol, BR-59072970 Natal, RN, Brazil
[5] Univ Fed Rio Grande do Norte, Dept Morfol, BR-59072970 Natal, RN, Brazil