[1] Univ Fed Maranhao, Dept Saude Publ, R Barao de Itapary 155, Sao Luis, Maranhao, Brazil
[2] Org Panamer Saude, Brasilia, DF, Brazil
[3] Methods Analyt & Technol Hlth MATH Consortium, Belo Horizonte, MG, Brazil
[4] Minist Saude, Brasilia, DF, Brazil