1 Department of Neuroradiology, Paris-Descartes University, Centre Hospitalier Sainte-Anne, INSERM UMR894, 75014 Paris, France. Electronic address: o.naggara@ch-sainte-anne.fr.
2 Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada.
3 Department of Neuroradiology, Paris-Descartes University, Centre Hospitalier Sainte-Anne, INSERM UMR894, 75014 Paris, France.
4 International Consortium of Neuroendovascular Centres, Interventional Neuroradiology Research Unit, Department of Radiology, University of Montreal, CHUM Notre-Dame Hospital, Montreal, QC, Canada.