Surfactant in chronic smokers.
D001980:Bronchi / Q000032:analysis*; D001991:Bronchitis; D005374:Filtration; D006469:Hemoptysis; D006801:Humans; D008169:Lung Abscess; D011014:Pneumonia; D001261:Pulmonary Atelectasis; D011656:Pulmonary Emphysema; D011658:Pulmonary Fibrosis; D012907:Smoking; D013500:Surface Tension; D013501:Surface-Active Agents / Q000032:analysis*
D013501:Surface-Active Agents