Accepted for Publication: December 12, 2013.
Published Online: March 17, 2014. doi:10.1001/jamapediatrics.2013.5483.
Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: Tiberio, Kerr, Capaldi, Nowicka.
Drafting of the manuscript: Tiberio, Kerr, Nowicka.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Tiberio, Kerr.
Obtained funding: Kerr, Capaldi, Pears.
Study supervision: Capaldi, Nowicka.
Conflict of Interest Disclosures: None reported.
Funding/Support: This project was supported by the National Institute of Drug Abuse (grant R01 DA 015485 to Dr Capaldi), the National Institute on Alcohol Abuse and Alcoholism (grant 1R01AA018669 to Dr Capaldi), the National Institute of Child Health and Development (grant HD 46364 to Dr Capaldi), and the Sweden-America Foundation (Dr Nowicka), the Swedish Society for Medical Research (Dr Nowicka), and the Vinnmer Marie Curie International Qualification (Dr Nowicka).
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.
Disclaimer: The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health, the National Institute on Alcohol Abuse and Alcoholism, the National Institute of Drug Abuse, or the National Institute of Child Health and Development.