Author Contributions: Dr Brotherton 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: Salsberg, Rockey.
Acquisition of data: Brotherton, Jackson.
Analysis and interpretation of data: Salsberg, Rockey, Rivers, Brotherton, Jackson.
Drafting of the manuscript: Salsberg, Rivers, Jackson.
Critical revision of the manuscript for important intellectual content: Salsberg, Rockey, Rivers, Brotherton.
Statistical analysis: Salsberg, Rivers, Jackson.
Administrative, technical, or material support: Salsberg, Rockey, Rivers, Brotherton.
Study supervision: Salsberg, Rockey.
Financial Disclosures: None reported.
Funding/Support: The AAMC provided support for Mr Salsberg, Ms Rivers, and Mr Jackson for this research. The AMA provided support for Drs Rockey and Brotherton for this research.
Role of the Sponsor: The sponsors had no role in the design of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript.
Additional Contributions: We thank the Department of Census and Self-reported Data at the AMA and the Division of Health Care Affairs at the AAMC for administering the National GME Census.