Published Online: April 22, 2015. doi:10.1001/jamapsychiatry.2015.0094.
Study concept and design: Kempton, Fusar-Poli.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Kempton, Fusar-Poli.
Critical revision of the manuscript for important intellectual content: Bonoldi, Valmaggia, McGuire, Fusar-Poli.
Statistical analysis: Kempton, Fusar-Poli.
Obtained funding: McGuire, Fusar-Poli.
Administrative, technical, or material support: Bonoldi, McGuire, Fusar-Poli.
Study supervision: McGuire, Fusar-Poli.
Conflict of Interest Disclosures: None reported.
Funding/Support: Dr Kempton was funded by a Medical Research Council Fellowship (grant MR/J008915/1). Dr Fusar-Poli is funded by the Department of Psychosis Studies (King’s College London, London, England) and by the South London and the Maudsley NHS Foundation Trust.
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.