1. From the Erasmus Medical Center, Department of Cardiothoracic Surgery, Rotterdam, the Netherlands (M.M.M., A.J.J.C.B., J.J.M.T.); Heart and Diabetes Center North Rhine–Westphalia, Department of Thoracic and Cardiovascular Surgery, Bad Oeynhausen, Germany (H.K., O.W., J.G.); and University of Luebeck, Department of Cardiac and Thoracic Vascular Surgery, Luebeck, Germany (U.S., E.J.C., H.-H.S.).