1 Service de Neurochirurgie, CHU Cavale Blanche, INSERM UMR 1101 LaTIM, Brest, France.
2 Groupe d'étude de la Thrombose en Bretagne Occidentale (GETBO), 3878, Brest, EA, France.
3 Department of Surgery, Division of Neurosurgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, AB, Canada.
4 Department of Radiology, Service of Neuroradiology, Centre Hospitalier de l'Université de Montréal (CHUM), Notre-Dame Hospital, 1560 Sherbrooke East, Pavilion Simard, suite Z12909, Montreal, Quebec, Canada. [email protected].