Figure 3From: Smoking reduces surfactant protein D and phospholipids in patients with and without chronic obstructive pulmonary disease Bronchoalveolar lavage fluid phospholipid levels in never, former, and current smokers with normal lung function or COPD as defined by spirometry. Lipids were extracted and phospholipids measured. The never smokers had significantly more phospholipids in their lavage fluid compared to former and current smokers. Current smokers had significantly lower levels compared to former smokers.Back to article page