title: [A rare "cheerful" oligophrenic syndrome].
mesh_terms: D002648:Child; D002675:Child, Preschool; D006801:Humans; D008607:Intellectual Disability / Q000209:etiology* / Q000235:genetics; D009426:Netherlands; D010641:Phenotype
vernacular_title: Een zeldzaam (?) "vrolikjk", oligofreen syndroom