1. From the Department of Cardiology and Angiology (S.Z., K.W., G.M., J.K., P.M., A.B., G.B., L.E.) and the Department of Gastroenterology and Hepatology (H.U., F.L., T.M., W.D.), University Hospital of Muenster, Muenster, Germany; and the German Atrial Fibrillation Competence NETwork (G.B.).