@article{fumo-dos-santos_ferreira_2023,  title={Dealing with confounding in observational studies},  volume={49},  ISSN={1806-3713},  url={https://doi.org/10.36416/1806-3756/e20230281},  DOI={10.36416/1806-3756/e20230281},  number={4},  journal={Jornal Brasileiro de Pneumologia},  publisher={Sociedade Brasileira de Pneumologia e Tisiologia},  author={Fumo-dos-Santos, Cristiane and Ferreira, Juliana Carvalho},  year={2023},  pages={e20230281} }