Prevalence of trachoma in a population of the upper Rio Negro basin and risk factors for active disease - Cruz, Antônio Augusto Velasco; Medina, Norma Helen; Ibrahim, Marlon M.; Souza, Roberto M.; Gomes, Uilho Antonio; Gonçalves, Glauco F. O. R. (Ophthalmic Epidemiology, 2008)