Drupal-Bibcite31<style face="normal" font="default" size="100%">Recruitment of patients with Chronic Obstructive Pulmonary Disease (COPD) from the Clinical Practice Research Datalink (CPRD) for research</style><style face="normal" font="default" size="100%">Recruitment of patients with Chronic Obstructive Pulmonary Disease (COPD) from the Clinical Practice Research Datalink (CPRD) for research</style>