Submitted for Publication: November 10, 2014; final revision received April 10, 2015; accepted April 10, 2015.
Published Online: June 17, 2015. doi:10.1001/jamapsychiatry.2015.0712.
Study concept and design: Kubota, van Haren, Haijma, Cahn, Kahn.
Acquisition, analysis, or interpretation of data: Kubota, van Haren, Haijma, Schnack, Cahn, Hulshoff Pol.
Drafting of the manuscript: Kubota, van Haren, Haijma, Hulshoff Pol, Kahn.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Kubota, van Haren, Haijma, Schnack, Kahn.
Obtained funding: Kubota, Kahn.
Administrative, technical, or material support: van Haren, Schnack, Cahn, Kahn.
Study supervision: van Haren, Cahn, Kahn.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by grant 10-000-1001 from the Dutch Health Research Council and the Uehara Memorial Foundation.
Role of the Funder/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.
Additional Information: Part of this study was previously presented at the 4th Schizophrenia International Research Society Conference; April 7, 2014; Florence, Italy.