@article{sá_2021,  title={Maternal Mortality and the Public Health Service in Brazil},  volume={43},  ISSN={0100-7203},  url={https://doi.org/10.1055/s-0041-1736537},  DOI={10.1055/s-0041-1736537},  number={9},  journal={Revista Brasileira de Ginecologia e Obstetrícia},  publisher={Federação Brasileira das Sociedades de Ginecologia e Obstetrícia},  author={Sá, Marcos Felipe Silva de},  year={2021},  month={Sep},  pages={645–647} }