Submitted for Publication: April 7, 2014; final revision received June 24, 2014; accepted July 29, 2014.
Published Online: January 7, 2015. doi:10.1001/jamapsychiatry.2014.2138.
Study concept and design: Kendler, Ohlsson, J. Sundquist.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Kendler, Ji, Edwards.
Critical revision of the manuscript for important intellectual content: Kendler, Edwards, Ohlsson, J. Sundquist, K. Sundquist.
Statistical analysis: Kendler, Ji, Ohlsson.
Obtained funding: Kendler, J. Sundquist, K. Sundquist.
Administrative, technical, or material support: Edwards, J. Sundquist, K. Sundquist.
Study supervision: Kendler.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was funded by grants R37 AA011408, K01 AA021399, and P20 AA017828 from the National Institute on Alcohol Abuse and Alcoholism; grants 2008-3110 and 2008-2638 from the Swedish Research Council; the Swedish Research Council for Health; Working Life and Welfare (2013-1836); the ALF project grant, Lund, Sweden; Forte Sweden; and the Swedish Council for Information on Alcohol and Other Drugs (CAN).
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.