1. Division of Nephrology, Department of Medicine, Stanford University School of Medicine and VA Palo Alto Health Care System, CA (J.D.M., M.E.M.-R., A.C.P., M.K.T.).
2. Geriatric Research and Education Clinical Center, VA Palo Alto Health Care System, CA (I.-C.T., M.C.O., M.K.T.).
3. Division of Nephrology, Department of Medicine, Loma Linda University School of Medicine and Loma Linda VA Health Care System, CA (E.F.).
4. Quantitative Sciences Unit, Department of Medicine (V.C.), Stanford University School of Medicine, CA.
5. Department of Pathology (V.C.), Stanford University School of Medicine, CA.
6. Kaiser Permanente Bernard J. Tyson School of Medicine, Pasadena, CA (J.J.S., J.A.).
7. Department of Medicine, Division of Nephrology and Hypertension, Kaiser Permanente Los Angeles Medical Center, CA (J.J.S.).
8. Research and Evaluation, Kaiser Permanente Southern California, Pasadena, CA (J.A.).
9. Department of Epidemiology and Population Health (M.C.O.), Stanford University School of Medicine, CA.