Author Contributions: Dr Epstein 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: Asch, Nicholson, Epstein.
Acquisition of data: Asch, Nicholson, Epstein.
Analysis and interpretation of data: Asch, Nicholson, Srinivas, Herrin, Epstein.
Drafting of the manuscript: Asch, Epstein.
Critical revision of the manuscript for important intellectual content: Asch, Nicholson, Srinivas, Herrin, Epstein.
Statistical analysis: Herrin, Epstein.
Obtained funding: Asch, Nicholson, Herrin, Epstein.
Administrative, technical, or material support: Srinivas, Epstein.
Financial Disclosures: None reported.
Funding/Support: This work was supported by a grant from the Stemmler Fund of the National Board of Medical Examiners (Drs Asch, Nicholson, and Epstein).
Role of the Sponsor: The sponsor had no role in the design and conduct of the study, in the collection, management, analysis, and interpretation of the data, or in the preparation, review, or approval of the manuscript.
Additional Contributions: Robert Galbraith, MD, and Jillian Ketterer, BA, of the National Board of Medical Examiners, provided test score data. They received no compensation for their assistance.