@article{guffi_2003,  title={Surgical prophylaxis secundary to cryptogenic stroke or transient ischemic attack in patients with patent foramen ovale},  volume={18},  ISSN={0102-7638},  url={https://doi.org/10.1590/S0102-76382003000300009},  DOI={10.1590/S0102-76382003000300009},  number={3},  journal={Brazilian Journal of Cardiovascular Surgery},  publisher={Sociedade Brasileira de Cirurgia Cardiovascular},  author={Guffi, Michele E.A.},  year={2003},  month={Jul},  pages={242–252} }