1. Heart Center Bonn, Department of Medicine II, University Hospital Bonn, Germany (A.A., M.U.B., V.T., M.W., F.J., A.S., S.Z., E.G., J.-M.S., G.N.).
2. Hospital Clinico San Carlos IdiSSC, Universidad Complutense, Madrid, Spain (C.S., N.G., J.E.).
3. Heart Center Trier, Krankenhaus der Barmherzigen Brüder Trier, Germany (J.L., N.W.).