Published Online: October 1, 2011. doi:10.1001/archinternmed.2011.501
Author Contributions:Study concept and design: Kale, Bishop, Federman, and Keyhani. Analysis and interpretation of data: Kale, Bishop, and Keyhani. Drafting of the manuscript: Kale. Critical revision of the manuscript for important intellectual content: Bishop, Federman, and Keyhani. Statistical analysis: Kale. Administrative, technical, and material support: Keyhani. Study supervision: Bishop, Federman, and Keyhani.
Financial Disclosure: None reported.
Funding/Support: This project was not supported by external funds. Dr Kale is a fellow who is supported by a National Research Service Award grant. Dr Keyhani is funded by a Department of Veterans Affairs Health Services Research and Development Service Career Development Award.