1. Department for Cardiovascular Surgery, University Medical Center Ljubljana , Ljubljana, Slovenia
2. Faculty of Mathematics and Physics, University of Ljubljana , Ljubljana, Slovenia
3. Department of Thoracic and Cardiovascular Surgery, Saarland University Medical Centre , Homburg, Germany
4. Clinic for Diagnostic and Interventional Radiology, Saarland University Medical Centre , Homburg, Germany
5. Department of Cardiovascular Medicine, Mayo Clinic , Rochester, MN, USA
6. Department of Radiology, Mayo Clinic , Rochester, MN, USA