1. Department of Clinical Dentistry – Prosthodontics Faculty of Medicine University of Bergen Bergen Norway
2. Department of Thoracic Medicine Centre for Sleep Medicine Haukeland University Hospital Bergen Norway
3. Section for Thoracic Medicine Department of Clinical Science Faculty of Medicine University of Bergen Bergen Norway
4. Norwegian Competence Center for Sleep Disorders Haukeland University Hospital Bergen Norway
5. Department of Global Public Health and Primary Care Faculty of Medicine University of Bergen Berge Norway
6. Department of Welfare and Participation Western Norway University of Applied Sciences Bergen Norway