title: Reply.
authors.affiliation: Department of Neurology, Mayo Clinic, Rochester, Minnesota.
authors.forename: Charles D
authors.initials: CD
authors.lastname: Kassardjian
authors.affiliation: Department of Neurology, Mayo Clinic, Rochester, Minnesota.
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Sorenson
authors.affiliation: Department of Neurology, Mayo Clinic, Rochester, Minnesota.
authors.forename: Andrew G
authors.initials: AG
authors.lastname: Engel
mesh_terms: D004576:Electromyography; D005260:Female; D006009:Glycogen Storage Disease Type II / Q000150:complications*; D006801:Humans; D008297:Male; D009222:Myotonia / Q000175:diagnosis* / Q000209:etiology*