1. Neurovascular Service, Department of Neurology, Campinas State University, Campinas, São Paulo, Brazil
2. Department of Neurology, Brown University, Providence, Rhode Island
3. Neurovascular Service, Department of Neurology, Federal University of São Paulo, São Paulo, Brazil
4. Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts
5. Department of Neurology, Boston Medical Center, Boston University, Boston, Massachusetts
6. Stroke Service, Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts
7. National Institutes of Neurological Disorders and Stroke, Bethesda, Maryland
8. Neurovascular Service, Department of Neurology, University of California, San Francisco
9. Neuroendovascular and Neurocritical Care Services, Marcus Stroke and Neuroscience Center, Grady Memorial Hospital, Emory University School of Medicine, Atlanta, Georgia