1. From the Vascular Research Laboratory (J.L.M.-V., L.M.B.-C., B.M.-G., A.G.-H., J.E.), Department of Vascular Surgery (A.A.), and Department of Cardiology (J.T.), Fundación Jiménez Díaz, Autonoma University, and Department of Pathology, Hospital Clínico San Carlos (L.O.), Madrid, Spain.