Author Contributions: Dr Lehner had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Risch, Herrell, Lehner, Liang, Eaves, Hoh, Kovacs, Ott, Merikangas.
Acquisition of data: Lehner, Kovacs.
Analysis and interpretation of data: Risch, Herrell, Liang, Eaves, Ott, Merikangas.
Drafting of the manuscript: Risch, Herrell, Lehner, Griem, Merikangas.
Critical revision of the manuscript for important intellectual content: Risch, Herrell, Lehner, Liang, Eaves, Hoh, Griem, Kovacs, Ott, Merikangas.
Statistical analysis: Risch, Herrell, Liang.
Administrative, technical, or material support: Risch, Herrell, Griem, Lehner.
Study supervision: Lehner, Liang, Risch.
Financial Disclosures: None reported.
Funding/Support: This work was supported in part by the National Institutes of Health, National Institute of Mental Health, Intramural Research Program, Division of Developmental Translational Research, and Division of Neuroscience and Basic Behavioral Science.
Disclaimer: The views and opinions expressed in this report are those of the authors and should not be construed to represent the views of any of the sponsoring organizations or agencies or the US government.
Additional Contributions: The contribution of data from the investigators of the original studies included in this meta-analysis is gratefully acknowledged.
This article was corrected online for error in data on 6/18/2009, prior to publication of the correction in print.