1. Department of Neurology; Medical University of South Carolina; Charleston South Carolina
2. Department of Neurology; Perelman School of Medicine at the University of Pennsylvania; Philadelphia Pennsylvania
3. Department of Psychiatry; Perelman School of Medicine at the University of Pennsylvania; Philadelphia Pennsylvania
4. Department of Biostatistics and Epidemiology; Perelman School of Medicine at the University of Pennsylvania; Philadelphia Pennsylvania
5. Harvard Medical School; Boston Massachusetts
6. Department of Neurology; University of Cincinnati; Cincinnati Ohio
7. Department of Neurology; Oregon Health and Science University; Portland Oregon
8. Department of Epidemiology; University of California Irvine; Irvine California
9. Department of Pathology; University of Washington; Seattle Washington
10. Department of Pathology and Laboratory Medicine; Perelman School of Medicine at the University of Pennsylvania; Philadelphia Pennsylvania
11. Department of Neurology; VA Puget Sound Health Care System; University of Washington; Seattle Washington