1 Department of Cardiology, University Heart Center, University Hospital Zurich, University of Zurich, Rämistrasse 100, CH-8091 Zurich, Switzerland.
2 Department of Nuclear Medicine, University Hospital Zurich, University of Zurich, Rämistrasse 100, CH-8091 Zurich, Switzerland.
3 Department of Cardiovascular Surgery, University Heart Center, University Hospital Zurich, University of Zurich, Rämistrasse 100, CH-8091 Zurich, Switzerland.