@article{barbieri_silva_bettiol_gomes_2000,  title={Risk factors for the increasing trend in low birth weight among live births born by vaginal delivery, Brazil},  volume={34},  ISSN={0034-8910},  url={https://doi.org/10.1590/S0034-89102000000600006},  DOI={10.1590/S0034-89102000000600006},  number={6},  journal={Revista de Saúde Pública},  publisher={Faculdade de Saúde Pública da Universidade de São Paulo},  author={Barbieri, Marco A and Silva, Antônio AM and Bettiol, Heloisa and Gomes, Uilho A},  year={2000},  month={Dec},  pages={596–602} }