1. Division of CardiologyUniversity of British Columbia, Vancouver, BC, Canada
2. Evasc Medical Systems Corporation Vancouver, BC, Canada
3. Diagnostic and Therapeutic NeuroradiologySt Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
4. Department of NeurosurgeryNYU School of Medicine, NYU Langone Medical Center, New York, NY, USA
5. Department of NeurosurgeryRadboud University Nijmegen, Nijmegen, The Netherlands