High prevalence of asymptomatic plasmodium vivax and plasmodium falciparum infections in native amazonia populations - Alves, F. P.; Durlacher, R R.; Menezes, M J.; Krieger, Henrique; Silva, Luiz Hildebrando Pereira; Camargo, Erney Plessman (American Journal Tropical Medicine and Hygiene, 2002)