Author Contributions: Dr Elmore 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: Elmore, Lehman, Armstrong,
Analysis and interpretation of data: Elmore,
Lehman, Armstrong, Fletcher.
Drafting of the manuscript: Elmore, Lehman.
Critical revision of the manuscript for important
intellectual content: Elmore, Lehman, Armstrong, Fletcher.
Administrative, technical, or material support:
Study supervision: Elmore, Lehman, Armstrong.
Financial Disclosure: Dr Armstrong has served
as an expert witness about breast cancer risk. No other authors reported any
Funding/Support: Dr Elmore was supported by
grant K05-CA10469 from the National Cancer Institute. Dr Armstrong was supported
by the Robert Wood Johnson Generalist Physician Award.
Role of the Sponsor: The Robert Wood Johnson
Foundation did not participate in the design and conduct of the study; in
the collection, analysis, and interpretation of the data; or in the preparation,
review, or approval of the manuscript.
Disclaimer: The views expressed in this article
are those of the authors and do not necessarily reflect the opinion of the
Robert Wood Johnson Foundation.
Acknowledgment: We thank Carol Munch and Sue
Peacock for their administrative assistance.