1. University of Kentucky, Lexington, KY, USA
2. Mayo Clinic, Jacksonville, FL, USA
3. University of Pennsylvania, Philadelphia, PA, USA
4. Mayo Clinic, Rochester, MN, USA
5. Rush University Medical Center, Chicago, IL, USA
6. Illinois Institute of Technology, Chicago, IL, USA
7. Uppsala University, Uppsala, Sweden
8. Newcastle University, Newcastle upon Tyne, UK
9. University of Cambridge, Cambridge, UK
10. University of Southern California, Los Angeles, CA, USA
11. University of Minnesota, Minneapolis, MN, USA
12. The University of Sydney Brain and Mind Centre and Central Clinical School Faculty of Medicine and Health, Sydney, Australia
13. University of California, Irvine, CA, USA
14. University of Washington, Seattle, WA, USA
15. Institute of Neurology Medical University of Vienna, Vienna, Austria
16. Emory University, Atlanta, GA, USA
17. Stanford University, Stanford, CA, USA
18. Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan
19. University of California, San Diego, CA, USA
20. University of California, San Francisco, CA, USA
21. Harvard University, Cambridge, MA, USA
22. University of Texas Southwestern Medical Center, Dallas, TX, USA