1. Department of Cardiology B, Oslo University Hospital, Oslo, Norway.
2. Department of Cardiology, Stavanger University Hospital, Stavanger, Norway.
3. Department of Electrical Engineering and Computer Science, University of Stavanger, Stavanger, Norway.
4. INSERM, Centre d'Investigation Clinique-1433 and Unité 1116, Nancy, France.
5. CHU Nancy, Institut Lorrain du Cœur et des Vaisseaux, Vandoeuvre lès Nancy, Nancy, France.
6. Université de Lorraine, Faculté de Médecine, Nancy, France.
7. F-CRIN INI-CRCT (Cardiovascular and Renal Clinical Trialists) Network, Nancy, France.
8. Division of Cardiovascular Medicine, Department of Internal Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.
9. Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
10. Institute of Internal Medicine, University of Bergen, Bergen, Norway.