1. Department of Cardiovascular Surgery, University Heart Centre Freiburg, Freiburg, Germany
2. Faculty of Medicine, Albert-Ludwigs-University of Freiburg, Freiburg, Germany
3. Department for Diagnostic and Interventional Radiology, Medical Centre-University of Freiburg, Freiburg, Germany
4. Department of Cardiology and Angiology II, University Heart Centre Freiburg, Freiburg, Germany