1 Department of Neurosurgery, University Hospital of Caen, 14000 Caen, France; Normandie University, UNICAEN, Inserm, U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), Institut Blood and Brain at Caen-Normandie, Cyceron, 14000 Caen, France. Electronic address: thomas.gaberel@hotmail.fr.