[Occurrence of chronic bronchitis in a rural population].
D000293:Adolescent; D000328:Adult; D001991:Bronchitis / Q000453:epidemiology*; D002908:Chronic Disease; D003371:Cough; D003604:Czechoslovakia; D006801:Humans; D008297:Male; D008875:Middle Aged; D012129:Respiratory Function Tests; D012424:Rural Population; D012907:Smoking
Výskyt vleklé bronchitidy mezi venkovským obyvatelstvem.