1. From the Departments of Cardiac, Thoracic, and Vascular Surgery (A.A.L., A.A.A., U.P.R., J.E.), and Anaesthesiology (T.A.), Heart Institute Lahr/Baden, Lahr; Neoinformatics Group, Faculty of Technology, Bielefeld University, Bielefeld (B. Arnrich, J.A.W.); and Fraziskus Hospital Berlin, Berlin (B. Amann), Germany.