Department of Cardiology and Critical Care Medicine, Hartcentrum Hasselt, Jessa Ziekenhuis, Stadsomvaart 11, 3500 Hasselt, Belgium and Faculty of Medicine and Life Sciences Hasselt University, Hasselt, Belgium. Department of Medicine-Cardiology and Intensive Care, Hospital Munich-Thalkirchen, Peter Osypka Heart Center Munich, Am Isarkanal 36, Munich, Germany. Swiss Cardiovascular Center Bern, Bern University Hospital, Freiburgstrasse 8, Bern, Switzerland. Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands. Daiichi Sankyo Europe GmbH, Zielstattstr. 48, Munich, Germany. Division of Electrophysiology, Department of Cardiology and Angiology, University of Muenster, Muenster, Germany. St. Vincenz-Hospital, Paderborn, Am Busdorf 2, Paderborn, Nordrhein-Westfalen, 33098, Germany and Working Group: Molecular Electrophysiology, University Hospital Magdeburg, Magdeburg, Germany. Electronic address: Andreas.Goette@vincenz.de.