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A twin study of the genetics of high cognitive ability selected from 11,000 twin pairs in six studies from four countries.
Haworth CM, Wright MJ, Martin NW, Martin NG, Boomsma DI, Bartels M, Posthuma D, Davis OS, Brant AM, Corley RP, Hewitt JK, Iacono WG, McGue M, Thompson LA, Hart SA, Petrill SA, Lubinski D, Plomin R. Haworth CM, et al. Behav Genet. 2009 Jul;39(4):359-70. doi: 10.1007/s10519-009-9262-3. Epub 2009 Apr 21. Behav Genet. 2009. PMID: 19381794 Free PMC article.