Author Contributions: Dr Agaku 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: Agaku, Vardavas, Connolly.
Acquisition of data: Agaku, Connolly.
Analysis and interpretation of data: Agaku, Vardavas, Ayo-Yusuf, Alpert, Connolly.
Drafting of the manuscript: Agaku, Vardavas.
Critical revision of the manuscript for important intellectual content: Agaku, Vardavas, Ayo-Yusuf, Alpert, Connolly.
Statistical analysis: Agaku, Vardavas, Ayo-Yusuf.
Obtained funding: Connolly.
Study supervision: Vardavas.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Ayo-Yusuf reported serving on speakers bureaus for Pfizer. No other authors reported disclosures.
Funding/Support: National Cancer Institute grants 3R01 CA125224-03s1rev++ and 2R01 CA087477-09A2 funded the research for this study.
Role of the Sponsor: The National Cancer Institute had no role 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.
This article was corrected for errors on May 14, 2013.