Fetal alcohol exposure and IQ at age 8: evidence from a population-based birth-cohort study - Lewis, S; Zuccolo, L; Davey Smith, G; Macleod, J; Rodriguez, S; Draper, E; Barrow, M; Alati, R; Sayal, K; Ring, S; Golding, J; Gray, R (PloS ONE, 2012)