title: [Mental retardation. Progress in the search of causes means new challenge for the clinician].
authors.affiliation: Avdeling for medisinsk genetikk, Oslo.
authors.forename: K H
authors.initials: KH
authors.lastname: Orstavik
mesh_terms: D006801:Humans; D008607:Intellectual Disability / Q000209:etiology* / Q000235:genetics / Q000628:therapy