Frequency and duration of disability among company employees in 1971-72.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009017:Morbidity; D009787:Occupational Medicine; D012737:Sex Factors; D013997:Time Factors; D014481:United States