An improved serodiagnostic test for Chagas' disease employing a mixture of Trypanosoma cruzi recombinant antigens - Umezawa, Eufrosina Setsu; Bastos, Sueli F.; Coura, Jose Rodrigues; Levin, Mariano J.; Gonzalez, Antonio; Rangel-Aldao, Rafael; Zingales, Bianca; Luquetti, Alejandro Ostermayer; Silveira, José Franco da (Transfusion, 2003)