Figure 5From: Smoking status and anti-inflammatory macrophages in bronchoalveolar lavage and induced sputum in COPDSoluble mediators measured in BAL and induced sputum supernatants of COPD patients. Ex-smokers are represented by open symbols and smokers by closed symbols. Horizontal bars represent medians. P-values are corrected for recovery of BAL fluid using multiple linear regression.Back to article page