title: Letter to the editor: The Cam-type Deformity of the Proximal Femur Arises in Childhood in Response to Vigorous Sporting Activity.
authors.forename: Vincent Y
authors.initials: VY
authors.lastname: Ng
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Ellis
mesh_terms: D001265:Athletic Injuries / Q000473:pathology*; D005269:Femur / Q000473:pathology*; D025981:Hip Injuries / Q000473:pathology*; D006621:Hip Joint / Q000473:pathology*; D006801:Humans; D008297:Male