1. University Heart Center Lübeck, Division of Electrophysiology, Medical Clinic II (Department of Cardiology, Angiology and Intensive Care Medicine), University Hospital Schleswig-Holstein, Ratzeburger Allee 160, D-23538 Lübeck, Germany
2. German Center for Cardiovascular Research (DZHK), Partner Site Hamburg/Kiel/Lübeck, Lübeck, Germany
3. Carol Davila, University of Medicine and Pharmacy, Bucharest, Romania
4. LANS Cardio, Stephansplatz 5, 20354 Hamburg, Germany