1. Cardiac Intensive Care Unit, Medizinische Klinik und Poliklinik I (E.L., A.K., K.K., L.B., C.S., S.F., T.P., D.B., S.B., J.H., S.M., M.O.), Klinikum der Universität München, and German Center for Cardiovascular Research, partner site Munich Heart Alliance.
2. Medizinische Klinik und Poliklinik II, Universitätsklinikum Bonn, Germany (S.Z.).
3. Department of Cardiology, University Heart and Vascular Center Hamburg, and German Center for Cardiovascular Research, partner site Hamburg/Kiel/Lübeck (B.S.).
4. Herzchirurgische Klinik und Poliklinik (S.P., C.H.), Klinikum der Universität München, and German Center for Cardiovascular Research, partner site Munich Heart Alliance.
5. Department of Cardiology and Angiology, University Heart Center Freiburg-Bad Krozingen, Faculty of Medicine, University of Freiburg, Freiburg, Germany (D.W.).
6. Heart Center Leipzig at University of Leipzig, Department of Internal Medicine/Cardiology and Leipzig Heart Institute, Germany (H.T.).
7. Klinik für Kardiologie und Angiologie, Medizinische Hochschule Hannover, Germany (A.S.).