1. Department of Cardiology; Oslo University Hospital Rikshospitalet; Oslo Norway
2. Department of Cardiology; Sahlgrenska University Hospital; Gothenburg Sweden
3. Department of Cardiology; Rigshospitalet; Copenhagen Denmark
4. Department of Cardiology; Aarhus University Hospital; Skejby Denmark
5. The Clinic for Heart Failure and Valvular Disease; Skåne University Hospital and Lund University; Lund Sweden
6. Department of Cardiology; Heart and Medicine Center County Council of Ostergotland and Linkoping University; Linkoping Sweden
7. Novartis Norge AS; Oslo Norway
8. Transplant Institute; Sahlgrenska University Hospital; Gothenburg Sweden
9. K.G. Jebsen Cardiac Research Center and Center for Heart Failure Research; Faculty of Medicine; University of Oslo; Oslo Norway