Author Contributions: Dr Trock 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: Trock, Han, Freedland, Partin, Walsh.
Acquisition of data: Han, Freedland, Humphreys, Partin, Walsh.
Analysis and interpretation of data: Trock, Han, DeWeese, Walsh.
Drafting of the manuscript: Trock, Han, DeWeese, Partin.
Critical revision of the manuscript for important intellectual content: Trock, Freedland, Humphreys, DeWeese, Partin, Walsh.
Statistical expertise: Trock, Han, Humphreys.
Obtained funding: Trock, Partin, Walsh.
Administrative, technical, or material support: Partin.
Study supervision: Trock, Walsh.
Financial Disclosures: Dr Freedland reported serving on the speaker's and advisory boards for AstraZeneca and the advisory board for GTX Inc. No other authors reported financial disclosures.
Funding/Support: This study was supported in part by funds from the National Cancer Institute (grant CA58236) SPORE in Prostate Cancer and by gifts from Dr and Mrs Peter S. Bing to Dr Trock. Funding also was provided by the Department of Defense Prostate Cancer Research Program and the American Urological Association Foundation/Astellas Rising Star in Urology Award to Dr Freedland.
Role of the Sponsors: None of the sponsors or funders had any involvement in the design or conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review or approval of the manuscript.