1. Faculty of Medicine and Life Sciences, University of Tampere, Finland
2. Pihlajalinna Työterveys, Finland
3. New Social Research and Faculty of Social Sciences, University of Tampere, Finland
4. Department of Public Health Sciences, Karolinska Institutet, Sweden
5. Finnish Institute of Occupational Health, Tampere, Finland
6. Clinic of Occupational Medicine, Tampere University Hospital, Finland