title: Reply to Kamtchum-Tatuene and Fogang.
authors.affiliation: Department of Neurology, Geneva University Hospitals. Electronic address: nicolas.nicastro@hcuge.ch.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Nicastro
authors.affiliation: Department of Neurology, Geneva University Hospitals.
authors.forename: Fabienne
authors.initials: F
authors.lastname: Picard