title: [Epidemiological study of chronic symptoms of upper and lower respiratory airways].
mesh_terms: D000328:Adult; D001991:Bronchitis / Q000150:complications; D002908:Chronic Disease; D004196:Disease Outbreaks; D006801:Humans; D008875:Middle Aged; D012140:Respiratory Tract Diseases / Q000453:epidemiology*; D012220:Rhinitis / Q000150:complications; D015022:Yugoslavia
vernacular_title: Epidemioloska studija kronicnih smetnji gornjih i donjih disnih putova