Luciano, M; Hagenaars, SP; Davies, G; Hill, WD; Clarke, T; Shirali, M; Harris, SE; Marioni, RE; Liewald, DCM; Fawns-Ritchie, C; Adams, MJ; Howard, DM; Lewis, CM; Gale, CR; McIntosh, AM; Deary, IJ (University of Edinburgh. Centre for Cognitive Ageing and Cognitive Epidemiology, )