1. Department of Radiology, Mayo Clinic, Rochester, MN, USA
2. College of Medicine, Central Michigan University, Mount Pleasant, MI, USA
3. Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE, USA
4. Neurointerventional Program, Departments of Medical Imaging and Clinical Neurological Sciences, London Health Sciences Centre, Western University, London, ON, Canada
5. Neuroendovascular Program, Massachusetts General Hospital and Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
6. Department of Neurologic Surgery, Mayo Clinic, Rochester, MN, USA