1. From the Cardiovascular Research Institute (M.R., A.B., K.U., M.E.P.-I., T.J.K., G.F., E.H.S., E.M., A.L., P.A.), Department of Medicine, New York Medical College, Valhalla; Cardiovascular Research Center (H.K., S.R.H.), Temple University, Philadelphia, Pa; and San Diego State University Heart Institute (M.A.S.), Calif; and Tardini-Vitali-Mazza-Olivetti Stem Cell Center (E.M.), Parma, Italy.