1. Department of Radiology, Boston Medical Center, Boston, Massachusetts
2. Department of Neurology, Radiology, and Neurosurgery, Boston Medical Center, Boston, Massachusetts
3. Interventional Neuroradiology, Vall d'Hebron University Hospital, and Stroke Research Group, Vall d'Hebron Research Institute (VHIR), Barcelona, Spain
4. Rhode Island Hospital, Brown University, Providence, Rhodes Island
5. Department of Radiology, Lebanese American University - Gilbert and Rose Mary Chagoury School of Medicine, Beirut, Lebanon
6. Department of Radiology, CISSS de l'Abitibi-Temiscamingue, Québec, Canada