COPD exacerbations: defining their cause and prevention.

Lancet · 2007 · PMC7134993 · PMID 17765528

Europe PMC DOI

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failed to reach significanceno p-value reported

However, a trend was seen in the reduction of the number of exacerbations with the triple combination, which failed to reach significance possibly due to the small size of the study and the high dropout rate.

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