Submitted for Publication: October 4, 2013; final revision received February 3, 2014; accepted February 27, 2014.
Published Online: June 18, 2014. doi:10.1001/jamapsychiatry.2014.476.
Study concept and design: Lyall, Weisskopf, Ascherio, Santangelo.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Lyall, Weisskopf.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Lyall, Constantino, Weisskopf, Roberts, Santangelo.
Obtained funding: Lyall, Weisskopf, Ascherio, Santangelo.
Study supervision: Ascherio, Santangelo.
Conflict of Interest Disclosures: Dr Constantino reported having received royalties from Western Psychological Services from the distribution of the SRS. No other disclosures were reported.
Funding/Support: This work was supported by grants CA50385, HD062171, and HD042541 from the National Institutes of Health, grants 1788 and 2210 from Autism Speaks, and grant A-14917 from the US Army Medical Research and Material Command.
Role of the Sponsor: The funding sources had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.