Drupal-Bibcite31<style face="normal" font="default" size="100%">Socio-economic position and childhood multimorbidity: a study using linkage between the Avon Longitudinal Study of Parents and Children and the General Practice Research Database</style><style face="normal" font="default" size="100%">Socio-economic position and childhood multimorbidity: a study using linkage between the Avon Longitudinal Study of Parents and Children and the General Practice Research Database</style>