1. Department of Cardiology, Heart Center Leipzig at University of Leipzig, Germany (M.A.-W., P.H., O.D., D.O., J.W., N.M., M. Sandri, J.R.d.L., M.K., S.D., H.T.).
2. Department of Cardiology, Helios Klinikum Siegburg, Germany (P.B., R.M.).
3. Witten Herdecke University, Germany (P.B., M. Seyfarth, M.V., D.H.).
4. Department of Cardiology, Helios University Hospital Wuppertal, Germany (M. Seyfarth, M.V.).
5. University Department of Cardiac Surgery, Heart Center Leipzig, Germany (P.K., T.N., S.L., M.AB., D.H.).
6. Leipzig Heart Institute, Germany (A.-K.F., S.H.).
7. Department of Cardiac Surgery, Helios University Hospital Wuppertal, Germany (D.H.).