Abstract:The specificity and definition of blood eosinophil To the Editor: We read with great interest the article titled ''Blood eosinophil count thresholds and exacerbations in patients with chronic obstructive pulmonary disease'' by Yun et al. 1 This article confirmed that eosinophil count in circulation of patients with chronic obstructive pulmonary disease (COPD) was a predictive factor for exacerbations of COPD. Moreover, they tried to induce a novel type of COPD, eosinophilic COPD. However, there are some points… Show more
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