1 Clinical and Experimental Interventional Cardiology, University of Saarland, Homburg, Saar, Germany. Electronic address: bruno.scheller@uks.eu.
2 Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Radiology, Berlin, Germany.
3 Paul Gerhardt Diakonie Krankenhaus, Lutherstadt, Wittenberg, Germany.