title: [Strict and clear definitions are needed].
authors.forename: K H
authors.initials: KH
authors.lastname: Gustavson
authors.forename: I
authors.initials: I
authors.lastname: Emanuelsson
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D006801:Humans; D008607:Intellectual Disability / Q000145:classification / Q000175:diagnosis; D007360:Intelligence; D009626:Terminology as Topic