1. School of Educational Sciences and Psychology University of Eastern Finland Joensuu Finland
2. Department of Psychology and Logopedics University of Helsinki Helsinki Finland
3. Institute of Clinical Medicine University of Oslo Oslo Norway
4. R&D department, Division of Mental Health Services Akershus University Hospital Lørenskog Norway
5. Department of Psychiatry University of Helsinki Helsinki Finland
6. Clinicum, Faculty of Medicine University of Helsinki Helsinki Finland
7. Department of Epidemiology and Public Health University College London London UK
8. Division of Insurance Medicine Karolinska Institutet Stockholm Sweden