Authors: Sarah E Medland; David L Duffy; Margaret J Wright; Gina M Geffen; David A Hay; Florence Levy; Catherina E M van-Beijsterveldt; Gonneke Willemsen; Grant C Townsend; Vicki White; Alex W Hewitt; David A Mackey; J Michael Bailey; Wendy S Slutske; Dale R Nyholt; Susan A Treloar; Nicholas G Martin; Dorret I Boomsma Journal: Neuropsychologia Date: 2008-09-09 Impact factor: 3.139