We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleDefining the chromosomal basis of mental handicap.AuthorsHamerton, J L; Stranc, LPublicationLancet (London, England), 1999, Vol 354, Issue 9191, p1659ISSN0140-6736Publication typeJournal ArticleDOI10.1016/S0140-6736(99)00246-9