1. From the Atrial Fibrillation Network, Münster (P.K., A.G., U.S.), the Department of Cardiology, University Heart and Vascular Center Hamburg (P.K., T.T., N.B.), and the Institute of Medical Biometry and Epidemiology (A.-K.O., S.S., A.Z.), University Medical Center Hamburg–Eppendorf, and the German Center for Cardiovascular Research (DZHK) Partner Site Hamburg–Kiel–Lübeck (P.K., T.T., N.B.), Hamburg, the Department of Cardiology and Intensive Care Medicine, St. Vincenz Hospital Paderborn, Paderborn (A.G.)...