title: Reply.
authors.affiliation: Department of Radiology Children's Hospital Colorado Aurora, Colorado.
authors.forename: D M
authors.initials: DM
authors.lastname: Mirsky
authors.affiliation: Department of Radiology University of Colorado Anschutz Medical Campus Aurora, Colorado.
authors.forename: F N
authors.initials: FN
authors.lastname: Ahmed
authors.affiliation: Department of Radiology Children's Hospital Colorado Aurora, Colorado.
authors.forename: N V
authors.initials: NV
authors.lastname: Stence