RT Journal Article SR Electronic T1 Socio-economic inequalities in healthy child development: the evidence grows JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 193 OP 193 DO 10.1136/jech-2012-201040 VO 66 IS 3 A1 James R Dunn YR 2012 UL http://jech.bmj.com/content/66/3/193.abstract AB