<style face="normal" font="default" size="100%">The effect of COPD severity and study duration on exacerbation outcome in randomized controlled trials.</style>

Drupal-Bibcite

0<style face="normal" font="default" size="100%">The effect of COPD severity and study duration on exacerbation outcome in randomized controlled trials.</style><style face="normal" font="default" size="100%">The effect of COPD severity and study duration on exacerbation outcome in randomized controlled trials.</style>