An epidemiologic study of sarcoidosis.
D000328:Adult; D004777:Environment; D005007:Ethnology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012423:Rural Health; D012507:Sarcoidosis / Q000453:epidemiology*; D012723:Sex; D014197:Trees; D014481:United States