1. From the Department of Cardiology, University of Freiburg, Germany; Department of Surgery (J.E.R., E.J.B., Z.A., L.L.M., C.K.O.), University of Florida College of Medicine and the Malcolm Randall VAMC, Gainesville, Fla; and Department of Cardiology (M.V., J.J.P.), University of Amsterdam, the Netherlands.