1. Department of Medicine, Division of Neurology, Brain Research Center, University of British Columbia, Vancouver, Canada
2. Biostatistics Consultant, Minot, ND, USA
3. Department of Radiology, University of Texas Health Sciences Center at San Antonio, San Antonio, TX, USA
4. Department of Neurology, University of Texas Health Science Center at Houston, Houston, TX, USA
5. Department of Neurology, Boston University Medical Center (BUMC). Boston, USA
6. South Puget Sound Neurology, Tacoma, WA, USA
7. Department of Neurology, University of Texas Health Sciences Center at San Antonio, San Antonio, TX, USA
8. Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL, USA
9. Department of Medicine (Neurology), McMaster University, Hamilton, ON, Canada