1. Department of Epidemiology, University of Kentucky, Lexington, KY, USA
2. Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA
3. Department of Pathology, Division of Neuropathology, University of Kentucky, Lexington, KY, USA
4. Department of Neurology, University of Kentucky, Lexington, KY, USA
5. Department of Physiology, University of Kentucky, Lexington, KY, USA
6. Department of Neuroscience, University of Kentucky, Lexington, KY, USA