1. Department of Neurology Duke University Medical Center Durham NC
2. Clinical Research Center Chinese Stroke Association Beijing China
3. Department of Neurology Beijing Tiantan Hospital Capital Medical University Beijing China
4. Duke Clinical Research Institute Durham NC
5. Department of Neurology University of California Los Angeles CA
6. Division of Cardiology University of California Los Angeles CA
7. Brigham and Women's Hospital Heart and Vascular Center and Harvard Medical School Boston MA
8. Hotchkiss Brain Institute University of Calgary Alberta Canada
9. Stroke Service Massachusetts General Hospital and Harvard Medical School Boston MA