Chiavegatto Filho, A.D.P. et al. 2013. How to include the characteristics of the distritos of the Municipality of São Paulo in epidemiologic studies?: an income inequality analysis using the propensity score matching approach. Saúde e Sociedade. 22, 4 (Dec. 2013), 1145–1153. DOI:https://doi.org/10.1590/sausoc.v22i4.76508.