Association of socioeconomic position with maternal pregnancy and infant health outcomes in birth cohort studies from Brazil and the UK
A Matijasevich, C G Victora, D A Lawlor, J Golding, A M B Menezes, C L Araújo, A J D Barros, I S Santos, F C Barros, G Davey Smith
J Epidemiol Community Health Feb 2012, 66 (2) 127-135; DOI: 10.1136/jech.2010.108605