1. Division of Stroke and Cerebrovascular Diseases, Department of Neurology; The Warren Alpert Medical School of Brown University; Providence RI
2. Division of Stroke and Cerebrovascular Diseases, Department of Neurology; Columbia University Medical Center; New York NY
3. Department of Epidemiology, The Mailman School of Public Health; Columbia University; New York NY
4. Department of Diagnostic Imaging; The Warren Alpert Medical School of Brown University; Providence RI
5. Department of Emergency Medicine; The Warren Alpert Medical School of Brown University; Providence RI
6. Department of Neurosurgery; The Warren Alpert Medical School of Brown University; Providence RI
7. Division of Social Epidemiology, Department of Neurology, Global Institute of Public Health, NYU Langone Medical Center and Department of Epidemiology, College of Dentistry; New York University; New York NY