[1] Emory Univ, Sch Med, Grady Mem Hosp, Marcus Stroke & Neurosci Ctr,Dept Neurol, Atlanta, GA USA
[2] Emory Univ, Sch Med, Grady Mem Hosp, Marcus Stroke & Neurosci Ctr,Dept Neurosurg, Atlanta, GA USA
[3] Emory Univ, Sch Med, Grady Mem Hosp, Marcus Stroke & Neurosci Ctr,Dept Radiol, Atlanta, GA USA
[4] Univ Calif San Francisco, Dept Neurol, San Francisco, CA USA
[5] Univ So Calif, Dept Neurol, Los Angeles, CA USA
[6] Univ Calif Los Angeles, Dept Intervent Neuroradiol, Los Angeles, CA USA
[7] Concentric Med Inc, Div Clin Res, Mountain View, CA USA
[8] McMaster Univ, Dept Clin Epidemiol & Biostat, Hamilton, ON, Canada
[9] Univ Calif Los Angeles, Dept Neurol, Los Angeles, CA 90024 USA