1. From the Department of Medicine, Division of Nephrology (N.J.S., Y.L., J.A.D., C.F., L.L., K.X., Y.-J.N., Y.D.N., J.Y.Z., R.S., O.B., D.B., N.O., F.O., S.G., K.M., J.W., S.M., J.R., D.J.C., J.B., A.G.G., K.K.), the Department of Surgery (L.E.R.), and the Department of Pathology and Cell Biology (E.-R.M.V., G.V., V.D.), Vagelos College of Physicians and Surgeons, and the Departments of Epidemiology (S.M.) and Biostatistics (I.I.-L.), Mailman School of Public Health, Columbia University, New York;...