1. From the Department of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
2. Department of Radiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
3. Department of Cardiovascular Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.