@article{arredondo_nájera_2008,  title={Equity and accessibility in health? Out-of-pocket expenditures on health care in middle income countries: evidence from Mexico},  volume={24},  ISSN={0102-311X},  url={https://doi.org/10.1590/S0102-311X2008001200010},  DOI={10.1590/S0102-311X2008001200010},  number={12},  journal={Cadernos de Saúde Pública},  publisher={Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz},  author={Arredondo, Armando and Nájera, Patricia},  year={2008},  month={Dec},  pages={2819–2826} }