@article{rodriguez-villamizar_castro-ortiz_rey-serrano_2012,  title={The effects of air pollution on respiratory health in susceptible populations: a multilevel study in Bucaramanga, Colombia},  volume={28},  ISSN={0102-311X},  url={https://doi.org/10.1590/S0102-311X2012000400014},  DOI={10.1590/S0102-311X2012000400014},  number={4},  journal={Cadernos de Saúde Pública},  publisher={Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz},  author={Rodriguez-Villamizar, Laura Andrea and Castro-Ortiz, Henry and Rey-Serrano, Juan Jose},  year={2012},  month={Apr},  pages={749–757} }