@article{2013,  title={Cartas ao Editor},  volume={28},  ISSN={0102-7638},  url={https://doi.org/10.5935/1678-9741.20130064},  DOI={10.5935/1678-9741.20130064},  number={3},  journal={Brazilian Journal of Cardiovascular Surgery},  publisher={Sociedade Brasileira de Cirurgia Cardiovascular},  year={2013},  month={Jul},  pages={412–419} }