Combination Long-Acting Β-Agonists and Inhaled Corticosteroids Compared With Long-Acting Β-Agonists Alone in Older Adults With Chronic Obstructive Pulmonary Disease
JAMA - Journal of the American Medical Association - United States
doi 10.1001/jama.2014.11432
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September 17, 2014
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American Medical Association (AMA)