title: Problems of differential diagnosis between mental retardation and autismus infantum.
mesh_terms: D001321:Autistic Disorder / Q000175:diagnosis*; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis*; D007361:Intelligence Tests