Fig. 1

Sputum e-DNA concentrations in asthma patients and healthy controls: the concentrations were (26.1 ± 16.5, 41.0 ± 44.1 and 54.2 ± 42.4 ng/µl) in healthy controls, mild-moderate asthma and severe asthma, respectively. P-values are from Wilcoxon–Mann–Whitney-Test