title: Authors' Response to Letter to the Editor.
authors: Department of Neurology, University of Illinois-Chicago, Neurology, Chicago, IL lzeidm1@UIC.EDU.
authors: Lawrence A
authors: LA
authors: Zeidman
authors: Department of Neurology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark.
authors: Daniel
authors: D
authors: Kondziella
authors: Department of Neurology, University of Illinois-Chicago, Neurology, Chicago, IL.
authors: James L
authors: JL
authors: Stone