1. From Gonda Diabetes Research Center (Z.-G.X., L.L., R.N.), Beckman Research Institute of the City of Hope, Duarte, Calif; Division of Nephrology and Hypertension (N.D.V., Z.L., L.S.), University of California at Irvine, Irvine, Calif; and Servicio Nephrologia (B.R.-I.), Hospital Universitario, Universidad del Zulia Maracaibo, Venezuela.