1. Department of Clinical Science University of Bergen Bergen Norway
2. Department of Clinical Psychology University of Bergen Bergen Norway
3. Department of Health and Functioning Western Norway University of Applied Sciences Bergen Norway
4. Department of Physiotherapy Haukeland University Hospital Bergen Norway
5. Department of Psychosocial Science University of Bergen Norway
6. Department of Public Health and Primary Care, KU Leuven University of Leuven Leuven Belgium
7. Norwegian Competence Center for Sleep Disorders Haukeland University Hospital Bergen Norway
8. Department of Psychiatry University of Pittsburgh School of Medicine Pittsburgh Pennsylvania USA
9. Department of Psychiatry Washington University School of Medicine St. Louis Missouri USA
10. Department of Health Registries Norwegian Institute of Public Health Bergen Norway
11. Department of Pediatrics Haukeland University Hospital Bergen Norway