Drupal-Bibcite31<style face="normal" font="default" size="100%">Trends in kidney function testing in UK primary care since the introduction of the quality and outcomes framework: a retrospective cohort study using CPRD</style><style face="normal" font="default" size="100%">Trends in kidney function testing in UK primary care since the introduction of the quality and outcomes framework: a retrospective cohort study using CPRD</style>