@article{ahumada-barrios_alvarado_2016,  title={Risk Factors for premature birth in a hospital},  volume={24},  ISSN={0104-1169},  url={https://doi.org/10.1590/1518-8345.0775.2750},  DOI={10.1590/1518-8345.0775.2750},  journal={Revista Latino-Americana de Enfermagem},  publisher={Escola de Enfermagem de Ribeirão Preto / Universidade de São Paulo},  author={Ahumada-Barrios, Margarita E. and Alvarado, German F.},  year={2016},  pages={e2750} }