1. Department of Heart Disease Haukeland University Hospital Bergen Norway
2. Department of Cardiology Asklepios Clinic St. Georg Hamburg Germany
3. Department of Medicine Svendborg Hospital Svendborg Denmark
4. Department of Cardiology Oslo University Hospital Oslo Norway
5. University Hospital of South Manchester Manchester UK
6. Research Unit of Internal medicine Medical Research Center Oulu Oulu University Hospital and University of Oulu Oulu Finland
7. Division of Cardiology Heart Center University of Rostock Rostock Germany
8. Department of Clinical Science University of Bergen Bergen Norway