@article{birolini_rasslan_utiyama_2016,  title={Unintentionally retained foreign bodies after surgical procedures. Analysis of 4547 cases},  volume={43},  ISSN={0100-6991},  url={https://doi.org/10.1590/0100-69912016001004},  DOI={10.1590/0100-69912016001004},  number={1},  journal={Revista do Colégio Brasileiro de Cirurgiões},  publisher={Colégio Brasileiro de Cirurgiões},  author={Birolini, Dário Vianna and Rasslan, Samir and Utiyama, Edivaldo Massazo},  year={2016},  month={Jan},  pages={12–17} }