1. Division of Interventional Neuroradiology and Stroke Center; University of California; Los Angeles CA
2. Department of Diagnostic and Interventional Neuroradiology, Inselspital; University of Bern; Bern Switzerland
3. Departments of Medical Imaging and Surgery, Toronto Western Hospital and University Health Network; University of Toronto; Toronto Ontario Canada
4. Department of Neurology; Emory University; Atlanta GA
5. Departments of Neurosurgery and Radiology and Toshiba Stroke and Vascular Research Center; University at Buffalo, State University of New York
6. Department of Neurology; Medical College of Wisconsin; Milwaukee WI
7. Department of Neurology and Stroke Center; University of California; Los Angeles CA