1. Department of Neurology, Neurosurgery, Emory University Hospital, Atlanta, Georgia
2. Duke Clinical Research Institute, Durham, North Carolina
3. Department of Neurology, University of Calgary, Calgary, Alberta, Canada
4. Brigham and Women’s Hospital Heart & Vascular Center
5. Harvard Medical School, Boston, Massachusetts
6. Department of Neurology, Duke University, Durham, North Carolina
7. Department of Cardiology, University of California, Los Angeles Medical Center, Los Angeles
8. Department of Neurology, Massachusetts General Hospital, Boston