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; Immunogenetics and Biology of Transplantation, Città della Salute e della Scienza, University Hospital of Turin, and Medical Genetics, Department of Medical Sciences, University of Turin, Turin (Z.D., S.D., A.A.), and the Division of Nephrology, Azienda Ospedaliera Spedali Civili of Brescia, Montichiari Hospital, University of Brescia, Brescia (F.S.) - all in Italy; the Department of Pathology, M.D. Anderson Cancer Center, Houston (F.Z.J.); the Division of Genetics and Genomics, Boston Children's Hospital, and the Department of Medical Oncology, Dana-Farber Cancer Institute, Boston (M.R.); the Department of Pediatrics, Division of Pediatric Nephrology, University of Michigan School of Medicine, Ann Arbor (C.E.G., M.G.S.); the Department of Medicine, Renal, Electrolyte, and Hypertension Division, University of Pennsylvania, Philadelphia (Y.-A.K., K.S.); the Division of Nephrology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey (Y.C.); the Nephrology Research Group, Queen's University of Belfast, Belfast, United Kingdom (A.E.C., A.P.M., A.J.M.); and the Department of Internal Medicine, Division of Nephrology (S.J.L.B., M.H.B.), and the Department of Epidemiology, Unit of Genetic Epidemiology and Bioinformatics (H.S.), University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.