Expression of the T helper 17-associated cytokines IL-17A and IL-17F in asthma and COPD.

Chest · 2010 · PMC2972626 · PMID 20538817

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highly significantno p-value reported

In COPD there was a highly significant, albeit small, increase in sputum IL-17 compared with asthma, and this was correlated with airflow obstruction and lung function impairment, but not airway inflammation.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.