title: The need for a proper definition of a "treatment refractoriness" in tourette syndrome.
authors.affiliation: Functional Neurosurgical Unit, IRCCS Galeazzi Milano, Italy.
authors.forename: Mauro
authors.initials: M
authors.lastname: Porta
authors.forename: Marco
authors.initials: M
authors.lastname: Sassi
authors.forename: Claudia
authors.initials: C
authors.lastname: Menghetti
authors.forename: Domenico
authors.initials: D
authors.lastname: Servello