1. Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Palo Alto, California (M.E.M., E.F.)
2. Geriatric Research, Education, and Clinical Center, Veterans Affairs Palo Alto, Palo Alto, California (I.-C.T.)
3. Quantitative Sciences Unit, Department of Medicine, and Department of Pathology, Stanford University School of Medicine, Stanford, California (V.C.)
4. Department of Epidemiology and Population Health, School of Medicine, Stanford University, Stanford, California, and Geriatric, Research, Education, and Clinical Center, Veterans Affairs Palo Alto, Palo Alto, California (M.C.O.)
5. Department of Surgery, Stanford University School of Medicine, and Division of General Surgery, Veterans Affairs Palo Alto Health Care System, Palo Alto, California (C.D.S.)
6. Department of Surgery, Stanford University School of Medicine, and Division of Vascular Surgery, Veterans Affairs Palo Alto Health Care System, Palo Alto, California (S.A.)
7. Division of Nephrology, Department of Medicine, University of Washington, and Hospital and Specialty Medicine Service and Center of Innovation for Veteran-Centered and Value-Driven Care, Veterans Affairs Puget Sound Health Care System, Seattle, Washington (A.M.O., S.P.Y.W.)
8. Division of Nephrology, Department of Medicine, Stanford University School of Medicine, and Geriatric Research, Education, and Clinical Center, Veterans Affairs Palo Alto, Palo Alto, California (M.K.T.).