@article{szklo_thrasher_perez_figueiredo_fong_almeida_2013,  title={Understanding the relationship between socioeconomic status, smoking cessation services provided by the health system and smoking cessation behavior in Brazil},  volume={29},  ISSN={0102-311X},  url={https://doi.org/10.1590/S0102-311X2013000300007},  DOI={10.1590/S0102-311X2013000300007},  number={3},  journal={Cadernos de Saúde Pública},  publisher={Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz},  author={Szklo, André Salem and Thrasher, James F. and Perez, Cristina and Figueiredo, Valeska Carvalho and Fong, Geoffrey and Almeida, Liz Maria de},  year={2013},  month={Mar},  pages={485–495} }