Fig. 1
From: Multi-level immune response network in mild-moderate Chronic Obstructive Pulmonary Disease (COPD)
Proportion of immune cell populations (mean ± SD), expressed as percentage of total CD45+ cells, both in lung tissue (Top panels a and b) and circulating blood (Bottom panels c and d). Study groups: never smokers (white bars), smokers with normal lung function (grey bars), COPD-former smokers (COPD-FS, gray stripped bars) and COPD current smokers (COPD-CS, black bars). Note the different Y scales in right vs. left panels. For further explanations, see text