1. Department of Cardiology Akershus University Hospital Lørenskog Norway
2. Institute of Clinical Medicine University of Oslo Oslo Norway
3. Department of Ear, Nose and Throat Surgery Akershus University Hospital Lørenskog Norway
4. Department of Behavioural Medicine Faculty of Medicine Institute of Basic Medical Sciences University of Oslo Oslo Norway
5. Department of Applied Physics University of Eastern Finland Kuopio Finland
6. Diagnostic Imaging Center Kuopio University Hospital Kuopio Finland
7. Department of Clinical Psychology University of Bergen Bergen Norway
8. School of Information Technology and Electrical Engineering The University of Queensland Brisbane Queensland Australia
9. School of Technology Reykjavik University Sleep Institute Reykjavik University Reykjavik Iceland
10. Landspitali University Hospital Reykjavik Iceland
11. Service Center Kuopio University Hospital Kuopio Finland