Published Online: November 10, 2010. doi:10.1001/jama.2010.1638
Author Contributions: Dr Choi 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: Choi, Willett, Curhan.
Acquisition of data: Choi, Willett, Curhan.
Analysis and interpretation of data: Choi, Willett, Curhan.
Drafting of the manuscript: Choi, Curhan.
Critical revision of the manuscript for important intellectual content: Choi, Willett, Curhan.
Statistical analysis: Choi, Willett.
Obtained funding: Choi, Willett, Curhan.
Administrative, technical, or material support: Choi, Curhan.
Study supervision: Choi, Curhan.
Financial Disclosures: Dr Choi reports receiving research funding for other projects from Takeda Pharmaceuticals and serving on advisory boards for Takeda Pharmaceuticals and Savient Pharmaceuticals. Dr Curhan reports serving as a consultant for Takeda Pharmaceuticals. No other disclosures were reported.
Funding/Support: This research was supported by grants AR056042, P01CA087969, and P60AR047785 from the National Institutes of Health.
Role of the Sponsor: The sponsor had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; or preparation, review, or approval of the manuscript.