title: Measurements of maximal expiratory flow rates in cigarette smokers and nonsmokers using gases of high and low densities.
mesh_terms: D000328:Adult; D005260:Female; D005459:Fluorides; D005540:Forced Expiratory Flow Rates; D005740:Gases; D006371:Helium; D006801:Humans; D008168:Lung / Q000503:physiopathology; D008297:Male; D008448:Maximal Expiratory Flow Rate; D008875:Middle Aged; D010100:Oxygen; D012119:Respiration; D012907:Smoking / Q000503:physiopathology*; D013147:Spirometry; D013455:Sulfur
chemical_list: D005740:Gases; D006371:Helium; D013455:Sulfur; D005459:Fluorides; D010100:Oxygen