1. Emeritus of Nursing and Sociology, Department of Social and Behavioral Sciences, University of California San Francisco, San Francisco, CA, USA.
2. Center for Quality Aging, Department of Medicine, Division of Geriatrics, Vanderbilt University, Nashville, TN, USA.
3. Division of General Internal Medicine and Public Health, Center for Quality Aging, Vanderbilt University, Nashville, TN, USA.
4. Department of Veterans Affairs, Geriatric Research Education and Clinical Center, Tennessee Valley Healthcare System, Nashville, TN, USA.
5. University of British Columbia Department of Family Practice, Vancouver, BC, USA.
6. Department of Medicine, Division of Geriatrics, Vanderbilt University, Nashville, TN, USA.