@article{1990,  title={Agradecimento},  volume={5},  ISSN={0102-7638},  url={https://doi.org/10.1590/S0102-76381990000300001},  DOI={10.1590/S0102-76381990000300001},  number={3},  journal={Brazilian Journal of Cardiovascular Surgery},  publisher={Sociedade Brasileira de Cirurgia Cardiovascular},  year={1990},  month={Dec},  pages={I–I} }