Author Contributions: Dr Shu 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: Shu, W. Zheng, Lu.
Acquisition of data: Y. Zheng, Gu, Lu.
Analysis and interpretation of data: Shu, Cai, Chen.
Drafting of the manuscript: Shu.
Critical revision of the manuscript for important intellectual content: Shu, Y. Zheng, Cai, Gu, Chen, W. Zheng, Lu.
Statistical analysis: Cai.
Obtained funding: Shu, W. Zheng.
Administrative, technical, or material support: Y. Zheng, Gu, Chen, Lu.
Study supervision: Shu.
Financial Disclosures: Dr Shu reports having received a research development fund from the United Soybean Board in 2005. No other disclosures were reported.
Funding/Support: This study was supported by grants from the US Department of Defense Breast Cancer Research Program (grant DAMD 17-02-1-0607) and the National Cancer Institute (grant R01 CA118229).
Role of the Sponsors: The funding organizations had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; or preparation and approval of the manuscript.
Disclaimer: The content of the report does not necessarily reflect the position or the policy of the US government, and no official endorsement should be inferred.
Additional Contributions: We thank Fan Jin, MD, a paid consultant for the Shanghai Institute of Preventive Medicine, for her support of the study's implementation. She received compensation for her assistance. We thank Bethanie Hull, BA, Vanderbilt University, for her assistance in manuscript preparation. She received salary support from the grants. We thank the participants and staff members of the Shanghai Breast Cancer Survival Study for making this study possible.