Can we trust the answers : reliability and validity of self reported sick leave due to musculoskeletal systems : letter.
Sick leaves in four factories : do characteristics of employees and work conditions explain differences in sickness absence between workplaces?
Predicting sickness absence : are extended health check ups of any value : comparisons of three individual risk models.
The association between a tiered pharmacy benefit plan and medication usage, health status, and disability absence days : one employer's experience.
The work ability index and single-item question : associations with sick leave, symptoms, and health - a prospective study of women on long-term sick leave.