Drupal-Bibcite31<style face="normal" font="default" size="100%">Characteristics, disease burden and costs of COPD patients in the two years following initiation of long-acting bronchodilators in UK primary care</style><style face="normal" font="default" size="100%">Characteristics, disease burden and costs of COPD patients in the two years following initiation of long-acting bronchodilators in UK primary care</style>