title: Farmer's lung, its geographic distribution.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005203:Farmer's Lung / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D008350:Manitoba; D008875:Middle Aged; D014481:United States