1. Kaiser Northern California Diabetes Program, Endocrinology and Internal Medicine, Kaiser Permanente, South San Francisco Medical Center, South San Francisco, California, USA.
2. Division of Research, Kaiser Permanente, Oakland, California, USA.
3. Division of Geriatrics, University of California, San Francisco, San Francisco, California, USA.
4. Department of General Internal Medicine, University of California, San Francisco, San Francisco, California, USA.
5. Department of Health Systems and Population Health, University of Washington, Seattle, Washington, USA.