@article{dalmau_freitas_savino_1993,  title={A modified assay for measuring thymocyte co-stimulatory activity},  volume={88},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761993000300011},  DOI={10.1590/S0074-02761993000300011},  number={3},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Dalmau, Sergio R. and Freitas, Claudia S. and Savino, Wilson},  year={1993},  month={Jul},  pages={419–425} }