1. From the Department of Pathology (C.R., G.J., A.R.), Institute of Biometrics (B.P.), Division of Cardiology (H.U.K., A.G.), and Department of Cardiovascular Surgery (C.H.), Otto-von-Guericke-University, Magdeburg, and Department of Pathology (W.S.), Marienkrankenhaus, Hamburg, Germany.