Drupal-Bibcite31<style face="normal" font="default" size="100%">Estimating the effect of nasal steroid treatment on repeat polypectomies: survival time analysis using the General Practice Research Database</style><style face="normal" font="default" size="100%">Estimating the effect of nasal steroid treatment on repeat polypectomies: survival time analysis using the General Practice Research Database</style>