1 Department of Neurology, Hôpital de la Timone, AP-HM, Aix-Marseille University, Marseille, France.
2 Department of Ophtalmology, Hôpital de la Timone, AP-HM, Aix-Marseille University, Marseille, France.
3 Department of Neurology, Hôpital de la Timone, AP-HM, Aix-Marseille University, Marseille, France; CNRS, CRMBM, Aix-Marseille University, Marseille, France.
4 Department of Neurology, Hôpital de la Timone, AP-HM, Aix-Marseille University, Marseille, France. Electronic address: sarah.demortiere@ap-hm.fr.