From the Department of Clinical and Experimental Medicine (R.D.P., F.D.G., G.A., M.F.P.), Department of Experimental Medicine, Section of Pharmacology (L.B., F.R.), and Department of Cardiothoracic and Respiratory Sciences, Section of Cardiology (R.C., L.F., G.C., M.G.R., P.G.), Second University of Naples, Naples; Department of Internal Medicine and Cardiovascular Sciences (M.C.), Division of Cardiology, University of Naples “Federico II”, Naples; and the Division of Cardiology (G.A., C.G., I.T., S... (At 2006-02-07)