title: [Chronic obstructive pulmonary disease in smokers: an early stage].
authors.forename: N S
authors.initials: NS
authors.lastname: Antonov
authors.forename: G M
authors.initials: GM
authors.lastname: Sakharova
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000453:epidemiology* / Q000209:etiology / Q000503:physiopathology; D012307:Risk Factors; D012426:Russia / Q000453:epidemiology; D012907:Smoking / Q000009:adverse effects*