1. From the Department of Cardiology, Asklepios Hospital St. Georg, Hamburg, Germany (K.-H.K., S.E., A.M.); Department of Cardiology-Electrophysiology, University Heart Center, Hamburg, Germany (B.A.H., S.W.); Department of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany (K.W., A.T.); Division of Rhythmology, Department of Cardiovascular Medicine, University Hospital Münster, Münster, Germany (L.E., G.B.); and Department of Cardiology, University...