Behavioral phenotype of sex chromosome aneuploidies: 48,XXYY, 48,XXXY, and 49,XXXXY.
Visootsak J, Rosner B, Dykens E, Tartaglia N, Graham JM. Behavioral phenotype of sex chromosome aneuploidies: 48,XXYY, 48,XXXY, and 49,XXXXY. Am J Med Genet A. 2007 Jun 01; 143A(11):1198-203.