The publisher regrets that at the time the article was published the Conflict of Interest statement and Acknowledgements were omitted. The statements should have read as follows:
Conflicts of Interest
Catherine Lord receives royalties from the publisher of diagnostic instruments used in this study. All profits are given to charity. Other authors declare no conflict of interest.
Acknowledgements
This work was supported Autism Speaks grant (2573; C.S.M.), and National Institutes of Health grants (R01NS54784 and R01DC009410 to D.M.M. and U19HD35482 and MH066496 to C.L.).
The publisher would like to apologise for any inconvenience caused.