@article{fernandes_souza_passini jr._tedesco_cecatti_2021,  title={Perinatal Outcomes and Factors Associated with Ethnic Group in cases of Preterm Birth: the Multicenter Study on Preterm Birth in Brazil},  volume={43},  ISSN={0100-7203},  url={https://doi.org/10.1055/s-0041-1739492},  DOI={10.1055/s-0041-1739492},  number={11},  journal={Revista Brasileira de Ginecologia e Obstetrícia},  publisher={Federação Brasileira das Sociedades de Ginecologia e Obstetrícia},  author={Fernandes, Karayna Gil and Souza, Renato Teixeira and Passini Jr., Renato and Tedesco, Ricardo Porto and Cecatti, José Guilherme},  year={2021},  month={Nov},  pages={811–819} }