Accepted for Publication: June 6, 2011.
Author Contributions: Dr Pape had full access to all of the data in the study and takes full responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Pape, Hunt, Butler, Siemienczuk, LeBlanc, and Gillanders. Acquisition of data: Pape, Butler, Rozenfeld, and Bonin. Analysis and interpretation of data: Pape, Hunt, Butler, Gillanders, Rozenfeld, and Bonin. Drafting of the manuscript: Pape, Hunt, Butler, Gillanders, Rozenfeld, and Bonin. Critical revision of the manuscript for important intellectual content: Pape, Butler, Siemienczuk, LeBlanc, and Rozenfeld. Statistical analysis: Rozenfeld. Obtained funding: Hunt. Administrative, technical, and material support: Pape, Butler, LeBlanc, Gillanders, and Bonin. Study supervision: Pape, Hunt, Butler, Siemienczuk, and Gillanders. Clinical expertise and project management: Butler.
Financial Disclosure: None reported.
Funding/Support: This study was supported with grants from the Merck Foundation and Providence Health Plan.
This article was corrected for a typographical error in the subtitle on September 12, 2011.