RT Journal Article SR Electronic T1 Trends in maternal obesity and health inequalities in a nationally representative sample of 619 323 births in England, UK, 1989–2007 JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 6 OP 6 DO 10.1136/jech.2009.096701f VO 63 IS Suppl 2 A1 N. Heslehurst A1 J. Rankin A1 J. Wilkinson A1 C. D. Summerbell YR 2009 UL http://jech.bmj.com/content/63/Suppl_2/6.abstract AB