1. Institute of Clinical Medicine Faculty of Medicine University of Oslo Oslo Norway
2. Department of Cardiology Oslo University Hospital, Rikshospitalet Oslo Norway
3. K.G. Jebsen Cardiac Research Center and Center for Heart Failure Research Faculty of Medicine University of Oslo Oslo Norway
4. Research Institute of Internal Medicine Oslo University Hospital Rikshospitalet Oslo Norway
5. Department of Rheumatology Dermatology and Infectious Disease Oslo University Hospital Oslo Norway