1. Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA;
2. Department of Epidemiology, University of Kentucky, Lexington, KY, USA;
3. Graduate Center for Gerontology, University of Kentucky, Lexington, KY, USA;
4. College of Social Work, University of Kentucky, Lexington, KY, USA;
5. Department of Behavioral Science, University of Kentucky, Lexington, KY, USA;
6. Department of Neurology, University of Kentucky, Lexington, KY, USA