An improved serodiagnostic test for Chaga's disease employing a mixture of Trypanosoma cruzi recombinant antigens - Umezawa, Eufrosina S.; Bastos, S. F.; Coura, J. R.; Levin, M. J.; Gonzalez, A.; Rangel-Aldao, R.; Zingales, Bianca; Luquetti, A. O.; Silveira, J. F. (Transfusion, 2003)