@article{silva_2011,  title={Polyoma BK virus: an emerging opportunistic infectious agent of the human central nervous system},  volume={15},  ISSN={1413-8670},  url={https://doi.org/10.1590/S1413-86702011000300017},  DOI={10.1590/S1413-86702011000300017},  number={3},  journal={Brazilian Journal of Infectious Diseases},  publisher={Brazilian Society of Infectious Diseases},  author={Silva, Rodrigo Lopes da},  year={2011},  month={May},  pages={276–284} }