TNF polymorphisms and age of onset of severe cardiomyopathy are prognostic factors in severe chronic Chagas'cardiomyopathy (CCC) - Drigo, S. A.; Ianni, Barbara M.; Lopes, V.; Fae, K. C.; Mady, C.; Kalil, J.; Cunha Neto, E.; Cardoso, Maria Regina Alves; Braga, P.; Goldberg, A. C. (Meeting of the Brazilian Society of Immunology, 2003)