@article{melo_vicentini_perrella_murta_claro_2019,  title={Comparative study of percutaneous nephrolithotomy performed in the traditional prone position and in three different supine positions},  volume={45},  ISSN={1677-5538},  url={https://doi.org/10.1590/S1677-5538.IBJU.2018.0191},  DOI={10.1590/S1677-5538.IBJU.2018.0191},  number={1},  journal={International braz j urol},  publisher={Sociedade Brasileira de Urologia},  author={Melo, Petronio Augusto de Souza and Vicentini, Fabio Carvalho and Perrella, Rodrigo and Murta, Claudio Bovolenta and Claro, Joaquim Francisco de Almeida},  year={2019},  month={Jan},  pages={108–117} }