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Meta-Analysis: Effect of Long-Acting β-Agonists on Severe Asthma Exacerbations and Asthma-Related Deaths
Shelley R. Salpeter, MD; Nicholas S. Buckley; Thomas M. Ormiston, MD; Edwin E. Salpeter, PhD
Annals of Internal Medicine 2006;144:904-912. doi:10.7326/0003-4819-144-12-200606200-00126

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