Author Contributions: Dr Walter 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: Walter, Bertenthal, Konety.
Acquisition of data: Bertenthal.
Analysis and interpretation of data: Walter, Bertenthal, Lindquist, Konety.
Drafting of the manuscript: Walter, Konety.
Critical revision of the manuscript for important intellectual content: Walter, Bertenthal, Lindquist, Konety.
Statistical analysis: Walter, Bertenthal, Lindquist.
Obtained funding: Walter.
Administrative, technical, or material support: Bertenthal.
Financial Disclosures: None reported.
Funding/Support: Dr Walter is a recipient of the Veterans Affairs Advanced Research Career Development Award in Health Services Research and Development and is supported by the Research Enhancement Award Program of the Health Services Research and Development Service of the Department of Veterans Affairs. Dr Konety is a recipient of the Dennis W. Jahnigen Career Development Scholar Award.
Role of the Sponsor: The funding sources had no role in the design and conduct of the study, or in the collection, management, analysis, and interpretation of the data or in the preparation, review, or approval of the manuscript.
Disclaimer: The views expressed in this article are those of the authors and do not necessarily reflect the position or policy of the Department of Veterans Affairs.