1. Heart and Vascular Centre, Semmelweis University , 68 Városmajor Street, 1122 Budapest , Hungary
2. Department of Surgical Research and Techniques, Semmelweis University , 68 Városmajor Street, 1122 Budapest , Hungary
3. Institut für Herzinfarktforschung , Ludwigshafen , Germany
4. Department of Heart Disease, Haukeland University Hospital , Bergen , Norway
5. Division of Cardiology, Department of Medicine, Karolinska Institutet , Stockholm , Sweden
6. Cardiology Division, Stavanger University Hospital , Stavanger , Norway
7. Department of Quality and Health Technology, University of Stavanger , Stavanger , Norway
8. Institute of Internal Medicine, University of Bergen , Bergen , Norway