title: Lung scans in asymptomatic heroin addicts.
mesh_terms: D000293:Adolescent; D000418:Albumins; D005260:Female; D006371:Helium; D006556:Heroin Dependence / Q000503:physiopathology*; D006801:Humans; D008297:Male; D009584:Nitrogen; D011653:Pulmonary Diffusing Capacity; D011877:Radionuclide Imaging; D012119:Respiration; D012129:Respiratory Function Tests; D012907:Smoking; D013667:Technetium; D014978:Xenon
chemical_list: D000418:Albumins; D006371:Helium; D014978:Xenon; D013667:Technetium; D009584:Nitrogen