1. From the Heart Center Bad Neustadt, Clinic for Interventional Electrophysiology, Bad Neustadt an der Saale, Germany (P.H., B.P., K.N., K.S., S.B., K.H., F.F., T.D.); Department of Cardiology and Angiology, Philipps University Marburg, Germany (P.H., U.L.); Cardiac Arrhythmia Service, Division of Cardiology, Pulmonology and Vascular Medicine, University Duesseldorf, Germany (P.M.); University Hospital Bergmannsheil, Ruhr-University Bochum, Germany (P.M., A.M., T.D.); and Clinic for Gastroenterology...