1. From the Institute of Cardiology, Catholic Univeristy, Rome (A.A., G.G.L.B.-Z., L.M.B.); the Department of Pathologic Anatomy, University of Trieste, Trieste (R.B., F.S.); and the Department of Biochemistry and Biophysics “F. Cedrangolo,” Pathologic Anatomy, Second University of Naples, Naples (R.R., F.B., A.B.), Italy.