TY - JOUR A1 - Kelly, Y. A1 - Panico, L. A1 - Bartley, M. A1 - Marmot, M. A1 - Nazroo, J. A1 - Sacker, A. T1 - Why does birthweight vary among ethnic groups in the UK? Findings from the Millennium Cohort Study Y1 - 2009 DO - 10.1093/pubmed/fdn057 VL - 31 IS - 1 ER -