1. Clinic for Cardiovascular Surgery, University Hospital Zurich, University of Zurich, Raemistrasse 100, Zurich, Switzerland
2. Department of Cardiovascular Surgery, Charité Universitätsmedizin Berlin, Charitéplatz 1, Berlin, Germany
3. Department of Cardiothoracic and Vascular Surgery, German Heart Institute Berlin, Augustenburger Platz 1, Berlin, Germany
4. Department of Biostatistics, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Hirschengraben 84, Zurich, Switzerland
5. Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Raemistrasse 100, Zurich, Switzerland
6. Feinberg School of Medicine, Northwestern University, Arthur J. Rubloff Building, 420 East Superior Street, Chicago, IL, USA
7. HeartClinic, Hirslanden Hospital, Witellikerstrasse 40, Zurich, Switzerland