Combination Long-Acting β-Agonists and Inhaled Corticosteroids Compared With Long-Acting β-Agonists Alone in Older Adults With Chronic Obstructive Pulmonary Disease

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Abstract
Chronic obstructive pulmonary disease (COPD) affects 5% to 22% of adults older than 40 years, has a lifetime risk of more than 25%, and is the third leading cause of death worldwide.1-3

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