1. Department of Neurosurgery and Neuroscience Institute, Geisinger, Danville, Pennsylvania
2. Toshiba Stroke and Vascular Research Center, Department of Neurosurgery, Department of Radiology, University at Buffalo, State University of New York, Buffalo, New York
3. Geisinger Commonwealth School of Medicine, Scranton, Pennsylvania
4. Department of Neurological Surgery, University of California, San Diego, La Jolla, California
5. Research Institute of Neurointervention, Paracelsus Medical University, Salzburg, Austria
6. Department of Radiology, Geisinger, Danville, Pennsylvania
7. Department of Neurosurgery, University of Tennessee Health Science Center and Semmes-Murphey Clinic, Memphis, Tennessee