@article{villanueva_hemstreet iii_2010,  title={The approach to the difficult urethral catheterization among urology residents in the United States},  volume={36},  ISSN={1677-5538},  url={https://doi.org/10.1590/S1677-55382010000600009},  DOI={10.1590/S1677-55382010000600009},  number={6},  journal={International braz j urol},  publisher={Sociedade Brasileira de Urologia},  author={Villanueva, Carlos and Hemstreet III, George P.},  year={2010},  month={Dec},  pages={710–717} }