Trends in disability.
D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007352:Insurance, Life; D008297:Male; D008875:Middle Aged; D009017:Morbidity; D009787:Occupational Medicine; D012140:Respiratory Tract Diseases / Q000453:epidemiology; D014481:United States