Author Contributions: Ms Gibbs 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: Gibbs, Martin, Kupper.
Acquisition of data: Gibbs, Johnson.
Analysis and interpretation of data: Gibbs, Martin, Kupper, Johnson.
Drafting of the manuscript: Gibbs, Martin, Kupper.
Critical revision of the manuscript for important intellectual content: Gibbs, Martin, Kupper, Johnson.
Statistical analysis: Kupper, Johnson.
Obtained funding: Gibbs, Martin,
Study supervision: Gibbs.
Financial Disclosures: None reported.
Funding/Support: Financial support for this research was provided by the Department of Defense, US Army Medical Research and Materiel Command, contract No. W81XWH-04-1-0073.
Role of the Sponsor: Data were provided by the US Army, whose staff reviewed the manuscript prior to submission.
Disclaimer: The views expressed are those of the authors and not necessarily those of the US Army.
Acknowledgment: René Robichaux, PhD, LCSW, Behavioral Health Division, US Army Medical Command, provided support and guidance during this research and made suggestions concerning the manuscript. Clayton Gable, PhD, US Army Medical Command, provided assistance with data issues. Neither of these individuals received compensation for their contributions. Kristen Sullivan, MSW, Department of Health Behavior and Health Education, University of North Carolina at Chapel Hill, assisted in the drafting of the manuscript and was compensated by a graduate assistantship at the University of North Carolina at Chapel Hill.