Management of Stable Chronic Obstructive Pulmonary Disease: A Systematic Review for a Clinical Practice Guideline

Figure 2.
Figure 2. Number of participants who had at least 1 exacerbation: inhalation treatments versus placebo.

LABA = long-acting β2-agonist; RR = relative risk.

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  1. Ann Intern Med November 6, 2007 vol. 147 no. 9 639-653
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