Ferreira, C. M.; Ferreira, W. A.; Motta, C. L.; Vasquez, F. G.; Pinto, A. F. Reactivity of VDRL Test in Bloodbags of the Amazon Hematology and Hemoterapy Foundation-Hemoam, the Decurrent Costs of Discharge and Estimative of Syphilis Prevalence in Blood Donnors of the Amazon State. DST 2006, 18, 14-17.