title: Response to letter to the editor.
authors.affiliation: Department of Radiology, Skeletal Division, Vancouver General Hospital, University of British Columbia, Vancouver, BC, Canada.
authors.forename: Hugue A
authors.initials: HA
authors.lastname: Ouellette
authors.affiliation: Department of Radiology, Skeletal Division, Vancouver General Hospital, University of British Columbia, Vancouver, BC, Canada. peter.munk@vch.ca.
authors.forename: Peter L
authors.initials: PL
authors.lastname: Munk