1. University Clinic of Cardiac Surgery, Medical University of Innsbruck, Innsbruck, Austria
2. University Clinic of Internal Medicine III, Cardiology and Angiology, Medical University of Innsbruck, Innsbruck, Austria
3. Department of Cardiovascular Surgery, Robert-Bosch-Krankenhaus, Stuttgart, Germany
4. University Clinic of Radiology, Medical University of Innsbruck, Innsbruck, Austria