@article{moraes_barreto_passos_golino_costa_vasconcelos_2011,  title={Incidence and main causes of severe maternal morbidity in São Luís, Maranhão, Brazil: a longitudinal study},  volume={129},  ISSN={1516-3180},  url={https://doi.org/10.1590/S1516-31802011000300005},  DOI={10.1590/S1516-31802011000300005},  number={3},  journal={Sao Paulo Medical Journal},  publisher={Associação Paulista de Medicina - APM},  author={Moraes, Ana Paula Pierre and Barreto, Sandhi Maria and Passos, Valéria Maria Azeredo and Golino, Patrícia Silva and Costa, Janne Ayre and Vasconcelos, Marina Xerez},  year={2011},  month={May},  pages={146–152} }