title: Stulberg classification system.
authors.forename: J
authors.initials: J
authors.lastname: Chell
authors.forename: M J
authors.initials: MJ
authors.lastname: Flowers
mesh_terms: D000465:Algorithms; D006801:Humans; D007873:Legg-Calve-Perthes Disease / Q000145:classification*; D015588:Observer Variation; D015203:Reproducibility of Results