Author Contributions: Dr Armstrong 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: Armstrong.
Acquisition of data: Armstrong, Micco, Carney,
Analysis and interpretation of data: Armstrong,
Drafting of the manuscript: Armstrong, Micco,
Critical revision of the manuscript for important
intellectual content: Armstrong, Carney, Stopfer, Putt.
Statistical analysis: Armstrong, Micco, Putt.
Obtained funding: Armstrong.
Administrative, technical, or material support:
Armstrong, Micco, Carney, Stopfer.
Study supervision: Armstrong.
Financial Disclosures: None reported.
Funding/Support: Dr Armstrong is supported
by the American Cancer Clinical Research Training Grant and the Robert Wood
Johnson Generalist Physician Faculty Scholar Award.
Role of the Sponsors: The funding organizations
had no role in the design and conduct of the study; the collection, management,
analysis and interpretation of the data; or the preparation, review, or approval
of the manuscript.
Acknowledgment: We acknowledge the work of
Barbara Weber, MD, and J. Sanford Schwartz, who provided valuable guidance
with the study design.