Charman, Tony;    Pickles, A;    Simonoff, Emily;    Chandler, Susie;    Loucas, Tom;    Baird, Gillian;      (2011)    IQ in children with autism spectrum disorders: data from the Special Needs and Autism Project (SNAP).                   Psychological Medicine , 41  (3)   pp. 619-627.          Green open access