@article{coutinho_gouveia_pinheiro_2021,  title={Polymethyl methacrylate balls: an unexpected and surprising finding during an autopsy},  volume={47},  ISSN={1806-3713},  url={https://doi.org/10.36416/1806-3756/e20210071},  DOI={10.36416/1806-3756/e20210071},  number={2},  journal={Jornal Brasileiro de Pneumologia},  publisher={Sociedade Brasileira de Pneumologia e Tisiologia},  author={Coutinho, Eduardo Manuel Barata and Gouveia, Rosa Henriques de and Pinheiro, João Emanuel Santos},  year={2021},  pages={e20210071} }