1. Department of Neurological Surgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
2. Department of Radiology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
3. Neuroendovascular Program, Massachusetts General Hospital & Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
4. Neurovascular Centre, Departments of Medical Imaging & Neurosurgery, St Michael's Hospital, University of Toronto, Toronto, ON, Canada
5. Department of Neurosurgery, Wake Forest University School of Medicine, Winston-Salem, NC, USA
6. Department of Neurosurgery, Medical University of South Carolina, Charleston, SC, USA