Published Online: October 9, 2013. doi:10.1001/jamapsychiatry.2013.2437.
Study concept and design: White, Lahti.
Acquisition of data: All authors.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Kraguljac, White, Lahti.
Critical revision of the manuscript for important intellectual content: White, Reid.
Statistical analysis: Kraguljac, White, Reid.
Obtained funding: Lahti.
Administrative, technical, or material support: White.
Study supervision: White.
Conflict of Interest Disclosures: Over the past 2 years, Dr Lahti has received research funds from the National Institutes of Health (grant RO1 MH081014) and an investigator-initiated research grant from Pfizer. No other disclosures were reported.
Funding/Support: This work was supported by the National Institutes of Health (grant RO1 MH081014).
Role of the Sponsor: The funding agency had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: We thank Jan den Hollander, PhD, at the University of Alabama at Birmingham, who provided invaluable input in MRS data acquisition methods.