Asthma--United States, 1980-1987.
D000328:Adult; D000368:Aged; D000553:Ambulatory Care; D001249:Asthma / Q000453:epidemiology* / Q000401:mortality; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014481:United States / Q000453:epidemiology