1. Geriatric Research and Education Clinical Center, Veterans Affairs Palo Alto Health Care System, Palo Alto, California
2. Division of Nephrology, Stanford University School of Medicine, Palo Alto, California
3. Quantitative Sciences Unit, Stanford University School of Medicine, Palo Alto, California
4. Center for Innovation to Implementation, Veterans Affairs Palo Alto Health Care System, Palo Alto, California
5. Division of General Medicine, Stanford School of Medicine, Palo Alto, California