title: Pulmonary function differences in normal smoking and nonsmoking, middle-aged, white-collar workers.
mesh_terms: D000328:Adult; D006801:Humans; D008168:Lung / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009790:Occupations; D012907:Smoking / Q000503:physiopathology*; D013147:Spirometry