Figure 2From: Smoking status and anti-inflammatory macrophages in bronchoalveolar lavage and induced sputum in COPDBAL differential cell counts expressed as percentage and cell concentrations of COPD patients. Percentage is shown in the left panel, cell concentrations in the right panel. Open circles represent ex-smokers, closed circles represent current smokers. Horizontal bars represent medians. P-values are corrected for recovery of BAL fluid using multiple linear regression.Back to article page