1. From CNR (C.Z., F.M., S.P., S.C., G.T.), Centre of Clinical Physiology and Division of Nephrology, Reggio Calabria, Italy; Division of Cardiology (F.A.B.), Morelli Hospital, Reggio Calabria, Italy; and Institute of Internal Medicine (A.C., L.S.M.), Geriatrics (G.S., B.S.), and Nephrosurgery (G.B., F.R., P.F.), University of Catania, Italy.