The role of depression and chronic pain conditions in absenteeism : results from a national epidemiologic survey.
Can we trust the answers : reliability and validity of self reported sick leave due to musculoskeletal systems : letter.
Are occupational factors important determinants of socioeconomic inequalities in musculoskeletal pain?
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.