title: Editorial.
authors.affiliation: Neurologie et pathologie du mouvement, hôpital de la Timone, Assistance publique-Hôpitaux de Marseille, 265, rue Saint-Pierre, 13385 Marseille, France. Electronic address: jean-philippe.azulay@ap-hm.fr.
authors.forename: J-P
authors.initials: JP
authors.lastname: Azulay
mesh_terms: D005602:France; D006801:Humans; D007802:Language; D009462:Neurology / Q000458:organization & administration* / Q000639:trends; D011643:Publishing / Q000458:organization & administration* / Q000592:standards