Fig. 1
From: Iron in airway macrophages and infective exacerbations of chronic obstructive pulmonary disease
a Sputum hemosiderin index in subjects during acute exacerbation and clinical stability. ***p < 0.001. Data shown as median (IQR). AECOPD acute exacerbation of chronic obstructive pulmonary disease. b Sputum supernatant iron concentration in subjects during acute exacerbation and clinical stability. Data shown as mean ± SEM. *p < 0.05. AECOPD acute exacerbation of chronic obstructive pulmonary disease