Submitted for Publication: April 15, 2013; final revision received July 12, 2013; accepted August 15, 2013.
Published Online: January 8, 2014. doi:10.1001/jamapsychiatry.2013.3579.
Study concept and design: Takayanagi, Gallo, Eaton, Mojtabai.
Acquisition of data: Roth, Gallo, Eaton.
Analysis and interpretation of data: Takayanagi, Spira, Eaton, Mojtabai.
Drafting of the manuscript: Takayanagi, Gallo, Mojtabai.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Takayanagi.
Obtained funding: Eaton.
Administrative, technical, or material support: Roth.
Study supervision: Spira, Gallo, Eaton, Mojtabai.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by grant DA026652 from the National Institute on Drug Abuse. Dr Spira is supported by Mentored Research Scientist Development Award 1K01AG033195 from the National Institute on Aging.
Role of the Sponsor: The funding organizations 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.