Author Contributions: Dr Henderson and Ms Hinton had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Henderson, Carpenter, and Chen. Acquisition of data: Henderson, Hinton, Carpenter, and Chen. Analysis and interpretation of data: Henderson, Reeder-Hayes, Hinton, and Chen. Drafting of the manuscript: Henderson, Reeder-Hayes, Carpenter, and Chen. Critical revision of the manuscript for important intellectual content: Henderson, Reeder-Hayes, Hinton, Carpenter, and Chen. Statistical analysis: Henderson. Obtained funding: Carpenter. Administrative, technical, and material support: Hinton, Carpenter, and Chen. Study supervision: Reeder-Hayes, and Chen. Communication regarding critical content: Carpenter.
Financial Disclosure: None reported.
Funding/Support: This work was supported by The Agency for Healthcare Research and Quality (AHRQ), US Department of Health and Human Services (US DHHS) as part of the Developing Evidence to Inform Decisions about Effectiveness (DEcIDE) program (contract No. HHSA290-2005-0040-I-TO4-WA4).
Disclaimer: Statements in the report should not be construed as endorsement by the AHRQ or the US DHHS.
Additional Contributions: The following additional contributors reviewed and provided their expertise on earlier versions of the manuscript: Janet K. Freburger, PhD, Amir H. Khandani, MD, W. Kimryn Rathmell, MD, PhD, and Sally C. Stearns, PhD, at the University of North Carolina at Chapel Hill, and Bruce E. Hillner, MD, at Virginia Commonwealth University.