title: In Reply.
authors.affiliation: Department of Emergency Medicine and Injury Prevention Center, Hasbro Children's Hospital, Providence, RI. zonfrillo@brown.edu.
authors.forename: Mark R
authors.initials: MR
authors.lastname: Zonfrillo
authors.affiliation: Center for Injury Research and Prevention, The Children's Hospital of Philadelphia, Philadelphia, PA.
authors.forename: Konny H
authors.initials: KH
authors.lastname: Kim
authors.affiliation: Division of Emergency Medicine and Center for Injury Research and Prevention, The Children's Hospital of Philadelphia, Philadelphia, PA.
authors.forename: Kristy B
authors.initials: KB
authors.lastname: Arbogast
mesh_terms: D001924:Brain Concussion / Q000175:diagnosis* / Q000000981:diagnostic imaging*; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*