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Department of Pathology and Cell Biology (R.A.H.), Columbia University, New York, New York 10032; Department of Clinical and Experimental Medicine (S.C., M.N., B.A., E.F.), University of Pisa School of Medicine, 56100 Pisa, Italy; Merck Research Laboratories (J.C.-P., D.X., L.W., M.C.), Cardiometabolic Disease, Kenilworth, New Jersey 07033; and CNR Institute of Clinical Physiology (E.F.), 56100 Pisa, Italy.