@misc{miscc4d2e5a4, title = {Absence of CD28 leads to increased susceptibility to experimental Trypanosoma cruzi infections}, author = {Martins, G. A. and Campanelli, A. P. and Tadokoro, C. E. and Vallochi, A. L. and Rizzo, Luiz Vicente and Silva, João Santana da}, year = {2001}, booktitle = {International Congress of Immunology} }