[1] Univ Pernambuco, Dept Materno Infantil, Recife, PE, Brazil
[2] Univ Fortaleza, Dept Saude Colet, Fortaleza, Ceara, Brazil
[3] Secretaria Vigilancia Saude, Minist Saude, Brasilia, DF, Brazil
[4] Univ Sao Paulo, Escola Enfermagem Ribeirao Preto, Ribeirao Preto, SP, Brazil
[5] Univ Brasilia, Dept Saude Colet, Brasilia, DF, Brazil