[Chronic obstructive pulmonary disease in smokers: an early stage].
Antonov
N S
NS
Sakharova
G M
GM
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*