1. Division of Neurology, Department of Medicine (G.P.S., S.Z., D.M., G.J.), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada.
2. Neuroscience and Mental Health Institute (J.K.-T., G.J.), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada.
3. Department of Medical Microbiology and Immunology (S.F.), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada.
4. Department of Neurology, University of California, Davis, Sacramento (B.S., B.P.A., F.R.S., G.J.).