Author Contributions: Dr Seal 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.
Study concept and design: Cohen, Bertenthal, Seal.
Acquisition of data: Bertenthal, Seal.
Analysis and interpretation of data: Cohen, Marmar, Ren, Bertenthal, Seal.
Drafting of the manuscript: Cohen.
Critical revision of the manuscript for important intellectual content: Cohen, Marmar, Ren, Bertenthal, Seal.
Statistical analysis: Ren.
Obtaining funding: Cohen, Seal.
Administrative, technical, or material support: Seal.
Study supervision: Marmar, Bertenthal, Seal.
Financial Disclosure: None reported.
Funding/Support: This study was funded by a VA Research Fellowship (Dr Seal), a VA Health Services Research and Development (HSR&D) Career Development Transition Award (Dr Seal), and a grant from the VA Seattle Epidemiological Research and Information Center (Dr Seal). Dr Cohen was supported by NIH/NCRR/OD UCSF-CTSI grant KL2 RR024130. This material is based on work supported in part by the VA HSR&D Research Enhancement Award Program, San Francisco VA Medical Center (REA 01-097).
Role of the Sponsor: The funding sources had no role in the design and conduct of the study; in the collection, management, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.