@article{barros_santos_matijasevich_domingues_silveira_barros_victora_2011,  title={Patterns of deliveries in a Brazilian birth cohort: almost universal cesarean sections for the better-off},  volume={45},  ISSN={0034-8910},  url={https://doi.org/10.1590/S0034-89102011005000039},  DOI={10.1590/S0034-89102011005000039},  number={4},  journal={Revista de Saúde Pública},  publisher={Faculdade de Saúde Pública da Universidade de São Paulo},  author={Barros, Aluísio J D and Santos, Iná S and Matijasevich, Alicia and Domingues, Marlos Rodrigues and Silveira, Mariângela and Barros, Fernando C and Victora, Cesar G},  year={2011},  month={Aug},  pages={635–643} }