1. Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 4, CH-3010 Bern, Switzerland
2. Department of Cardiac Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
3. Department of Diagnostic, Interventional and Pediatric Radiology, Inselspital, University of Bern, Bern, Switzerland