1. From the Nephrology and Hypertension Section (I.H.S., L.R.), Veterans Affairs Medical Center, Division of Nephrology and Hypertension and Vascular Biology Institute, University of Miami Miller School of Medicine, FL; Hypertension and Vascular Risk Unit (P.A., F.J.A., R.M.), University General Hospital, Malaga, Spain; and Department of Internal Medicine (M.V.), University of Bologna, Bologna, Italy.