Accepted for Publication: April 21, 2011.
Published Online: August 8, 2011. doi:10.1001 /archinternmed.2011.354
Correspondence: Brahmajee K. Nallamothu, MD, MPH, Department of Internal Medicine, Health Services Research and Development Center of Excellence, 1500 E Medical Center Dr, B1 226 Taubman, Ann Arbor, MI 48109-0022 (firstname.lastname@example.org).
Author Contributions: Dr Nallamothu 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: Nallamothu, Rogers, and Birkmeyer. Acquisition of data: Nallamothu. Analysis and interpretation of data: Nallamothu, Lu, Rogers, Gurm, and Birkmeyer. Drafting of the manuscript: Nallamothu and Lu. Critical revision of the manuscript for important intellectual content: Nallamothu, Lu, Rogers, Gurm, and Birkmeyer. Statistical analysis: Lu, Rogers, and Birkmeyer. Administrative, technical, and material support: Nallamothu and Birkmeyer. Study supervision: Nallamothu and Birkmeyer.
Financial Disclosure: None reported.
Funding/Support: This project was supported by grant 5R21AG032155-02 from the National Institutes of Health.
Role of the Sponsor: The funding agency was not involved in the design and conduct of the study; in data management or analysis; or in manuscript preparation.
Disclaimer: The views expressed in this article are those of the authors and do not necessarily represent the views of this agency or the Department of Veterans Affairs and the Department of Health and Human Services.
Additional Contributions: We are grateful to Onur Baser, PhD, and Li Wang, MSc, for their roles in preparing data.