@article{billis_2009,  title={Radical prostatectomy findings in patients in whom active surveillance of prostate cancer fails},  volume={35},  ISSN={1677-5538},  url={https://doi.org/10.1590/S1677-55382009000600019},  DOI={10.1590/S1677-55382009000600019},  number={6},  journal={International braz j urol},  publisher={Sociedade Brasileira de Urologia},  author={Billis, Athanase},  year={2009},  month={Nov},  pages={741–742} }