Drupal-Bibcite31<style face="normal" font="default" size="100%">Antibiotic exposure and \textquoterightresponse failure\textquoteright for subsequent respiratory tract infections: an observational cohort study of UK preschool children in primary care</style><style face="normal" font="default" size="100%">Antibiotic exposure and \textquoterightresponse failure\textquoteright for subsequent respiratory tract infections: an observational cohort study of UK preschool children in primary care</style>