1. From the Departments of Cardiology (T.L., H.J.C.) and Physiology (T.L., S.Z., P.K., U.S.), Maastricht University Medical Centre, Maastricht, the Netherlands; Division of Cardiology, Department of Medicine, Medical University of Graz, Graz, Austria (D.S., B.P.); Department Cardiology-Electrophysiology, University Heart Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany (P.K., B.A.H., S.W.); and Department of Cardiology, Hôpital Cardiologique du Haut Lévêque, Université Bordeaux, IHU...