1. Departments of Cardiology and Angiology (J.T., J.-T.S., L.C.N., U.F., P.R., J.B., A.S.), Hannover Medical School, Germany.
2. Cardiothoracic, Transplantation and Vascular Surgery (C.K., J.D.S., A.H.), Hannover Medical School, Germany.
3. Mid-German Heart Center, Department of Cardiology and Intensive Care Medicine, University Hospital, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany (D.G.S.).