Submitted for Publication: November 9, 2012; final revision received April 22, 2013; accepted June 4, 2013.
Published Online: November 20, 2013. doi:10.1001/jamapsychiatry.2013.2833.
Study concept and design: Moeller, Konova, Parvaz, Goldstein.
Acquisition of data: Parvaz, Tomasi, Goldstein.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Moeller.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Moeller, Konova, Parvaz.
Obtained funding: Moeller, Goldstein.
Administrative, technical, and material support: Parvaz, Tomasi, Lane, Fort, Goldstein.
Study supervision: Moeller, Tomasi, Goldstein.
Conflict of Interest Disclosures: None report.
Funding/Support: This research was supported by grants 1R01DA023579 (Dr Goldstein), 1F32DA030017-01 (Dr Moeller), and 1F32DA033088 (Dr Parvaz) from the National Institute on Drug Abuse.
Role of the Sponsor: The National Institute on Drug Abuse 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.
Additional Contributions: Michail Misyrlis, MS, Thomas Maloney, PhD, and Patricia A. Woicik, PhD, provided additional administrative, technical, or material support. Nelly Alia-Klein, PhD, performed psychiatric interviews as needed. Gene-Jack Wang, MD, performed medical screens as needed.