Fig. 2.
a) Malondialdehyde (MDA), b) 4-hydroxynonenal (HHE) and c) 4-hydroxyhexenal (HNE) paired levels in exhaled breath condensate (EBC) and induced sputum (IS) of subjects with asthma (○) and chronic obstructive pulmonary disease (■). Vertical bars represent median and 25–75 percentiles. **: p<0.01.