1. Department of Neurology, University of Utah, Salt Lake City, Utah, USA
2. Department of Neurology, University of Kentucky, Lexington, Kentucky, USA
3. Neurology Service, Lexington VA Medical Center, Lexington, Kentucky, USA
4. Graduate Center for Nutrition, University of Kentucky, Lexington, Kentucky, USA
5. Graduate Center for Toxicology, University of Kentucky, Lexington, Kentucky, USA
6. Department of Internal Medicine, University of Utah, Salt Lake City, Utah, USA
7. Huntsman Cancer Institute, Salt Lake City, Utah, USA
8. Department of Biostatistics, College of Public Health, University of Kentucky, Lexington, Kentucky, USA
9. Sanders Brown Center on Aging, University of Kentucky, Lexington, Kentucky, USA
10. Departments of Chemistry and Medicine, University of Vermont, Burlington, Vermont, USA
11. Department of Neurology, Columbia University, New York, NY, USA
12. Department of Neurology, University of Vermont, Burlington, Vermont, USA
13. Department of Neurology, Pennsylvania State University, Hershey, Pennsylvania, USA
14. Department of Statistics, College of Arts and Science, University of Kentucky, Lexington, Kentucky, USA