00486nas a2200157   4500000000100000008004100001100001500042700001200057700001600069700001700085700001500102245018300117300000700300490000700307022001400314       2013                            d1 aR. Cornish1 aA. Boyd1 aT. Van Staa1 aC. Salisbury1 aJ. Macleod00aSocio-economic position and childhood multimorbidity: a study using linkage between the Avon Longitudinal Study of Parents and Children and the General Practice Research Database  a660 v12  a1475-9276