1. Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
2. Duke Clinical Research Institute, Durham, NC
3. Department of Epidemiology, Michigan State University, East Lansing, MI
4. Department of Neurology, University of California, Los Angeles, CA
5. Division of Cardiology, University of California, Los Angeles, CA
6. Stroke Service, Massachusetts General Hospital, Boston, MA