[1] Univ Fed Pernambuco, Ctr Ciencias Biol, BR-50670400 Recife, PE, Brazil
[2] Ctr Pesquisas Aggeu Magalhaes, Dept Imunol, Lab Imunoepidemiol, Recife, PE, Brazil
[3] Univ Fed Pernambuco, Dept Farm, BR-50670400 Recife, PE, Brazil
[4] Univ Fed Pernambuco, Dept Materno Infantil, BR-50670400 Recife, PE, Brazil