Submitted for Publication: August 7, 2012; final revision received January 14, 2013; accepted January 14, 2013.
Published Online: April 9, 2013. doi:10.1001/jamapsychiatry.2013.288
Author Contributions: Dr van den Oord had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. All authors contributed their critical reviews of the manuscript during its preparation and approved submission of the final manuscript. Drs Aberg and Liu contributed equally to the work.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by grants R01HG004240, R01MH078069, and 1R01MH097283 (Drs Bukszár, Khachane, Aberg, and McClay) and grant R01MH080403 (Drs Sullivan and Liu) from the National Human Genome Research Institute.
Role of the Sponsors: The National Institute of Mental Health financially supported the design and conduct of the study but was not involved in manuscript review or approval.
Additional Information: Dr Ophoff acted as an author on behalf of the GROUP (Genetic Risk and Outcome in Psychosis) Consortium. Members of the consortium include René S. Kahn, MD, Don H. Linszen, MD, Jim van Os, MD, PhD, Durk Wiersma, PhD, Richard Bruggeman, MD, Wiepke Cahn, MD, Lieuwe de Haan, MD, Lydia Krabbendam, PhD, and Inez Myin-Germeys, PhD.