1. Department of Cardiology, Medical Center Hungarian Defence Forces, 44 Robert Karoly Krt., 1134 Budapest, Hungary
2. Heart and Vascular Center, Semmelweis University, 68 Varosmajor u., 1122 Budapest, Hungary
3. Cardiology Department, University Hospital Clinico San Carlos, Profesor Martin Lagos s/n, 28040 Madrid, Spain
4. Lithuanian University of Health Sciences, Cardiology Clinic, 2 Eiveniu str., 50161 Kaunas, Lithuania
5. Cardiothoracic Department, Tuscany Foundation Gabriele Monasterio, 1 Via G. Moruzzi, 56124 Pisa, Italy
6. Cardiology Department, Amiens University Hospital, Avenue Rene Laennec, 80000 Salouel Amiens, France
7. Cardiologia Ospedaliera Polyclinic of Bari, 11 Piazza Giulio Cesare, 70124 Bari, Italy
8. Bayer Healthcare, 178 Müllerstrasse, 13353 Berlin, Germany
9. Oslo Centre for Biostatistics and Epidemiology, Research Support Services, Oslo University Hospital, Postboks 4950 Nydalen, 0424 Oslo, Norway
10. Molecular and Clinical Research Institute and Cardiology Clinical Academic Group, St. George's University of London and Imperial College, London SW17 0RE, UK
11. Cardiology Department B and Faculty of Medicine, Oslo University Hospital, University of Oslo, 166 Kirkeveien, Building 3-A, 0407 Oslo, Norway