Figure 5From: Patterns of airway inflammation and MMP-12 expression in smokers and ex-smokers with COPDSmoking history and MMP-12+-macrophages. Correlation between smoking history (pack-years) and MMP-12+-macrophages (%) in BAL samples from COPD smokers, COPD ex-smokers and 'healthy' smokers (p < 0.05).Back to article page