1. Heart Center; University of Cologne; Germany
2. Medical Clinic II; Johannes Gutenberg University Mainz; Germany
3. Helios Heart Center Siegburg; Germany
4. University Heart Center Hamburg; Germany
5. Department of Cardiology and Pneumology; University of Göttingen; Germany
6. Stiftung für Herzinfarktforschung (IHF) Ludwigshafen; Germany
7. Cardiovascular Center Bethanien; Frankfurt Germany
8. Heart Center Brandenburg; Germany
9. Cardiology Clinic; University Hospital Essen; Germany
10. Clinic of Cardiology and Cardiovascular Medicine; University Clinic of Tuebingen; Germany
11. Medical Care Centre Hamburg; Germany