title: Some factors influencing the duration of morbidity in industry. Changing patterns of morbidity.
mesh_terms: D004739:England; D006261:Headache / Q000453:epidemiology; D006801:Humans; D007348:Insurance, Health; D009787:Occupational Medicine; D013180:Sprains and Strains / Q000453:epidemiology; D013997:Time Factors; D014852:Wales; D014947:Wounds and Injuries / Q000453:epidemiology