1. Department of Internal Medicine II; Cardiology, Medical University of Vienna; Vienna Austria
2. Department of Internal Medicine IV; Cardiology, Hospital of Hietzing; Vienna Austria
3. Department of Internal Medicine I; Cardiology, University Hospital of Krems; Krems an der Donau Austria
4. Karl Landsteiner Private University for Health Sciences; Krems an der Donau Austria
5. Department of Internal Medicine I; Cardiology and Nephrology, Hospital of St. John of God; Eisenstadt Austria