Accepted for Publication: May 20, 2011.
Author Contributions: Dr Cho had full access to all 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: Cho and Choueiri. Acquisition of data: Curhan and Hankinson. Analysis and interpretation of data: Cho, Curhan, Hankinson, Kantoff, Atkins, Stampfer, and Choueiri. Drafting of the manuscript: Cho and Choueiri. Critical revision of the manuscript for important intellectual content: Curhan, Hankinson, Kantoff, Atkins, Stampfer, and Choueiri. Statistical analysis: Cho. Obtained funding: Cho, Atkins, and Choueiri. Administrative, technical, and material support: Curhan, Atkins, Stampfer, and Choueiri. Study supervision: Kantoff, Atkins, and Choueiri.
Financial Disclosure: None reported.
Funding/Support: This study was supported by research grants CA137764, CA87969, and CA55075 from the National Institutes of Health; the Kidney Cancer Association; and grant NIH P50CA101942 from the Dana-Farber/Harvard Cancer Center Kidney Cancer Specialized Programs of Research Excellence.
Additional Contributions: Rong Tilney, MA (Brigham and Women's Hospital, Boston, Massachusetts), provided valuable computer support.