title: Is ankylosing spondylitis in childhood a distinct entity?
authors.forename: R E
authors.initials: RE
authors.lastname: Petty
mesh_terms: D002675:Child, Preschool; D018450:Disease Progression; D006801:Humans; D012216:Rheumatic Diseases / Q000145:classification / Q000503:physiopathology; D013167:Spondylitis, Ankylosing / Q000145:classification* / Q000503:physiopathology