1. Department of Cardiology St. Olavs Hospital Trondheim University Hospital Trondheim Norway
2. Faculty of Health and Social Sciences Western Norway University of Applied Sciences Bergen Norway
3. Department of Circulation and Medical Imaging Faculty of Medicine and Health Sciences Norwegian University of Science and Technology (NTNU) Trondheim Norway
4. Department of Cardiothoracic Surgery St. Olavs Hospital Trondheim University Hospital Trondheim Norway
5. Department of Heart Disease Haukeland University Hospital Bergen Norway
6. School of Health Sciences Jönköping University Jönköping Sweden
7. Department of Clinical Neurophysiology Linköping University Hospital Linköping Sweden