1. From the Laboratory of Experimental Cardiology (V.P.W.S., G.P.), Department of Vascular Surgery (G.J.B., F.L.M.), Department of Radiology (M.A.A.J.B.), and Department of Pathology (A.V.), University Medical Center Utrecht, Utrecht, The Netherlands; and Department of Vascular Surgery, St Antonius Hospital, Nieuwegein, The Netherlands (J.-P.P.M.V.).