M. F. Silveira, A. J. D. Barros, I. S. Santos, A. Matijasevich, and C. G. Victora, “ Socioeconomic differentials in performing urinalysis during prenatal care ”, Rev. saúde pública, vol. 42, no. 3, pp. 389–395, Jun. 2008, doi: 10.1590/S0034-89102008000300001.