1. Department of Neurosurgery, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA;
2. Department of Neurosurgery, Gates Vascular Institute at Kaleida Health, Buffalo, New York, USA;
3. Department of Neurosurgery, Buffalo General Medical Center, Buffalo, New York, USA;
4. Department of Radiology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA;
5. Canon Stroke and Vascular Research Center, University at Buffalo, Buffalo, New York, USA;