1. Division of Cardiology, Department of Medicine, Medical University of Graz, 8036 Graz, Austria
2. Division of Internal Medicine, Cardiology and Nephrology, Department of Medicine, Hospital Wiener Neustadt, 2700 Wiener Neustadt, Austria
3. Division of Cardiology, Department of Medicine, University Hospital Salzburg, 5020 Salzburg, Austria
4. Division of Cardiology and Intensive Care, Department of Medicine, Kepler University Hospital Linz, 4020 Linz, Austria
5. Division of Cardiology and Intensive Care, Department of Medicine, Hospital Klinikum Wels-Grieskirchen, 4710 Grieskirchen, Austria
6. Division of Cardiology and Angiology, Department of Medicine, University Hospital Innsbruck, 6020 Innsbruck, Austria
7. Division of Cardiac Surgery, Medical University of Graz, 8036 Graz, Austria