Author Contributions: Drs Cambell and Weissman had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Campbell, Weissman, Ehringhaus, Goold, Moy.
Acquisition of data: Campbell, Weissman, Goold, Moy.
Analysis and interpretation of data: Campbell, Weissman, Goold, Rao, Moy, Feibelmann.
Drafting of the manuscript: Campbell, Weissman, Ehringhaus, Goold, Moy, Feibelmann.
Critical revision of the manuscript for important intellectual content: Campbell, Weissman, Ehringhaus, Goold, Rao, Moy, Feibelmann.
Statistical analysis: Goold, Rao.
Obtained funding: Campbell, Weissman, Moy.
Administrative, technical, or material support: Campbell, Ehringhaus, Moy, Feibelmann.
Study supervision: Campbell.
Financial Disclosures: Dr Moy reports that she had served as a consultant for Genetech and GlaxoSmithKline. No other authors reported financial conflicts.
Funding/Support: This study was supported by a grant from The Greenwall Foundation.
Role of the Sponsor: Other than providing funding for this study, The Greenwall Foundation had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript.