1. Department of Medicine Drammen Hospital, Vestre Viken Trust Drammen Norway
2. Department of Behavioural Medicine University of Oslo Oslo Norway
3. Oslo Center for Biostatistics and Epidemiology, Research Support Services Oslo University Hospital Oslo Norway
4. Department of Cardiology Vestfold Hospital Tonsberg Norway
5. Oslo University Hospital Rikshospitalet Oslo Norway
6. KG Jebsen Cardiac Research Center and Center for Heart Failure Research Oslo University Hospital Ullevål Oslo Norway
7. Department of Pharmacology Oslo University Hospital Oslo Norway