Author Contributions: Dr Mills 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: Mills, Teesson, Back, Brady, Baker, Hopwood, Sannibale.
Acquisition of data: Teesson, Baker, Barrett, Merz, Rosenfeld, Ewer.
Analysis and interpretation of data: Mills, Teesson, Back, Brady, Baker.
Drafting of the manuscript: Mills, Teesson, Baker.
Critical revision of the manuscript for important intellectual content: Teesson, Back, Brady, Baker, Hopwood, Sannibale, Barrett, Merz, Rosenfeld, Ewer.
Statistical analysis: Mills, Teesson, Barrett, Rosenfeld, Ewer.
Obtained funding: Mills, Teesson, Back, Baker, Hopwood, Sannibale.
Administrative, technical, or material support: Teesson, Brady, Hopwood, Barrett, Merz, Rosenfeld, Ewer.
Study supervision: Mills, Teesson, Brady, Baker.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Mills reported that her institution receives funding for her salary from the National Health and Medical Research Council and reported receiving payment for providing lectures for the Richmond Fellowship of New South Wales; receiving payment for the development of educational presentations for the University of New South Wales, the Alcohol Tobacco and Other Drug Association ACT, and the New South Wales Institute of Psychiatry; receiving funding from the Alcohol, Tobacco and Other Drugs Council of Tasmania to present at a symposium; and receiving payment from the Cancer Council of New South Wales to conduct an ethics review. Dr Back reported that her institution received funding from the Australian-American Fulbright Commission to support travel to meetings for this study and other purposes and reported serving as a consultant for California State University and receiving payment for lectures and travel expenses from the National Institute on Drug Abuse. Dr Barrett reported receiving funding from the University of New South Wales for the development of educational presentations and travel expenses. No other authors reported disclosures.
Funding/Support: This study was funded by Australian National Health and Medical Research Council (NHMRC) project grant 455209.
Role of the Sponsor: The NHMRC had no role in the design and conduct of the study; the collection, management, analysis, and interpretation of the data; or the preparation, review, or approval of the manuscript.
Additional Contributions: We thank Kim Felmingham, PhD, and Catherine Cahill, PhD (Trauma Stress Clinic, University of New South Wales, Sydney, New South Wales, Australia), for providing clinical supervision. Drs Felmingham and Cahill were remunerated for their contributions.