Submitted for Publication: September 4, 2013; final revision received February 19, 2014; accepted February 20, 2014.
Published Online: May 21, 2014. doi:10.1001/jamapsychiatry.2014.399.
Study concept and design: Kohno, London.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Kohno, London.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Kohno, Ghahremani, Hellemann.
Obtained funding: Kohno, London.
Administrative, technical, or material support: Ghahremani, London.
Study supervision: London.
Conflict of Interest Disclosures: None reported.
Funding/Support: This research was funded in part by National Institues of Health grants P20 DA022539, R01 DA020726 (Dr London), and M01 RR00865 (UCLA GCRC), and endowments from the Thomas P. and Katherine K. Pike Chair in Addiction Studies (Dr London) and the Marjorie M. Greene Trust. Drs Kohno and Morales were supported by institutional training grant T32 DA 024635 and F31 DA033120-02 and F31 DA0331-17, respectively.
Role of the Sponsor: The funders 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.