title: Reply.
authors.affiliation: Department of Neurology, Erasmus Hospital, Free University of Brussels, Brussels, Belgium.
authors.forename: Chantal
authors.initials: C
authors.lastname: Depondt
authors.affiliation: Department of Pathology and Cell Biology, Columbia University, New York, NY.
authors.forename: Erin L
authors.initials: EL
authors.lastname: Heinzen
authors.affiliation: Department of Genetics, Institute for Genomic Medicine, Columbia University Medical Center, New York, NY.
authors.forename: David B
authors.initials: DB
authors.lastname: Goldstein
mesh_terms: D006801:Humans; D009154:Mutation; D011505:Protein-Tyrosine Kinases; D013036:Spasms, Infantile
chemical_list: D011505:Protein-Tyrosine Kinases; C403262:TNK2 protein, human