1. Department of General and Interventional Cardiology, University Heart Center Hamburg, Germany (P.M.B., C.R.S., N.F., M.S., C.W., D.L., M.S., J.T.N., S.B., R.T., D.W.).
2. German Center for Cardiovascular Research, Partner Site Hamburg/Kiel/Lübeck (C.R.S., N.F., M.S., D.L., M.S., J.T.N., S.B., D.W.).
3. Department of Cardiac Surgery, University Hospital Heidelberg, Germany (B.S.).
4. Department of Cardiovascular Surgery, University Heart Center Hamburg, Germany (A.M.B., H.R.).
5. Heart Centre Ludwigshafen, Department of Cardiology, Germany (U.Z.).
6. Heart Centre Leipzig, University Hospital, Department of Internal Medicine/Cardiology, Germany (H.T.).
7. Cardiovascular Research Institute Basel and Department of Cardiology, University Hospital Basel, University of Basel, Switzerland (R.T.).