1. Department of Veterans Affairs, Birmingham/Atlanta Geriatric Research, Education, and Clinical Center, Decatur, Georgia, USA
2. Division of General Medicine and Geriatrics, Department of Medicine, Emory University, Atlanta, Georgia, USA
3. Departments of Sociology and Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
4. Nell Hodgson Woodruff School of Nursing, Emory University, Atlanta, Georgia, USA
5. Physician Assistant Program, Emory University School of Medicine, Atlanta, Georgia, USA
6. Division of Physical Therapy, Department of Rehabilitation Medicine, Emory University School of Medicine, Atlanta, Georgia, USA