title: An objective evaluation of the pitchfork analysis (PFA).
authors.forename: Lysle E
authors.initials: LE
authors.lastname: Johnston
mesh_terms: D002508:Cephalometry; D006801:Humans; D008312:Malocclusion, Angle Class II / Q000628:therapy; D009971:Orthodontics, Corrective; D017063:Outcome Assessment, Health Care / Q000379:methods*