[Fewer COPD exacerbations with beta blockade].
D000319:Adrenergic beta-Antagonists / Q000627:therapeutic use*; D015331:Cohort Studies; D018450:Disease Progression; D011446:Prospective Studies; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy*
D000319:Adrenergic beta-Antagonists