RT Journal Article SR Electronic T1 Are poor mothers and their infants healthier in richer areas? The protective effect of area socio-economic density JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 91 OP 91 DO 10.1136/jech.2009.096735m VO 63 IS Suppl 2 A1 C. Albor A1 K. Pickett A1 R. G. Wilkinson A1 D. Ballas YR 2009 UL http://jech.bmj.com/content/63/Suppl_2/91.abstract AB