1. Department of Neurology, University of Navarra, Pamplona, Spain
2. Department of Neurology, University of Pittsburgh, Pittsburgh, PA, USA
3. Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, USA
4. Department of Psychology, University of Pittsburgh, Pittsburgh, PA, USA
5. Laboratory of Neuro Imaging, UCLA School of Medicine, Los Angeles, CA, USA
6. Department of Neurology, University of California Davis, Davis, CA, USA
7. Department of Radiology, University of Pittsburgh, Pittsburgh, PA, USA
8. Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
9. Departments of Neurology and Epidemiology, University of Washington, Seattle, WA, USA
10. Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
11. Renal Section, VA Pittsburgh Medical Center, Pittsburgh, PA, USA
12. University of Vermont, Burlington, VT, USA
13. Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA