@article{azevedo_fernandes_2011,  title={Factors relating to failure to quit smoking: a prospective cohort study},  volume={129},  ISSN={1516-3180},  url={https://doi.org/10.1590/S1516-31802011000600003},  DOI={10.1590/S1516-31802011000600003},  number={6},  journal={Sao Paulo Medical Journal},  publisher={Associação Paulista de Medicina - APM},  author={Azevedo, Renata Cruz Soares de and Fernandes, Rejane Firmino},  year={2011},  month={Dec},  pages={380–386} }