We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleDiagnostic investigations in individuals with mental retardation: a systematic literature review of their usefulness.Authorsvan Karnebeek CD; Jansweijer MC; Leenders AG; Offringa M; Hennekam RCPublicationEuropean journal of human genetics : EJHG, 2005, Vol 13, Issue 1, p6ISSN1018-4813Publication typearticleDOI10.1038/sj.ejhg.5201279