1. Division of Interventional Neuroradiology, David Geffen School of Medicine, University of California, Los Angeles
2. Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles
3. Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts
4. Division of Cardiology, David Geffen School of Medicine, University of California, Los Angeles
5. Duke Clinical Research Center, Durham, North Carolina
6. Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina
7. Department of Neurology, University of Miami Health System, Miami, Florida
8. Department of Clinical Neurosciences and Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada