Philibert RA, King BH, Winfield S, Cook EH, Lee YH, Stubblefield B, Damschroder-Williams P, Dea C, Palotie A, Tengstrom C, Martin BM, Ginns EI. Association of an X-chromosome dodecamer insertional variant allele with mental retardation. Mol Psychiatry. 1998 Jul; 3(4):303-9.