Submitted for Publication: October 29, 2014; final revision received March 27, 2015; accepted April 13, 2015.
Published Online: July 15, 2015. doi:10.1001/jamapsychiatry.2015.0730.
Study concept and design: Copeland, Wolke, Shanahan.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Copeland, Shanahan.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Copeland, Wolke.
Obtained funding: Wolke, Shanahan, Costello.
Administrative, technical, or material support: Costello.
Study supervision: Wolke, Costello.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by the National Institute of Mental Health (grants MH080230, MH63970, MH63671, MH48085, MH075766, and MH094605), the National Institute on Drug Abuse (grants DA/MH11301, DA011301, DA016977, DA011301, and DA036523), the Brain and Behavior Research Foundation (Early Career Award to Dr Copeland), and the William T. Grant Foundation.
Role of the Funder/Sponsor: The funding organizations had no role in the design and conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.