title: Frequency and duration of disability among Metropolitan employees in 1977-79.
mesh_terms: D000041:Absenteeism; D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009017:Morbidity; D012737:Sex Factors; D013997:Time Factors; D014481:United States