Published Online: April 13, 2015. doi:10.1001/jamainternmed.2015.0674.
Study concept and design: Hussey, Mehrotra.
Acquisition, analysis, or interpretation of data: Hussey, Huckfeldt, Hirshman.
Drafting of the manuscript: Hussey, Hirshman.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Hussey, Huckfeldt, Hirshman.
Obtained funding: Hussey, Mehrotra.
Study supervision: Hussey, Mehrotra.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by the Institute of Medicine.
Role of the Funder/Sponsor: The Institute of Medicine provided input on the design and conduct of the study, but was not involved in the collection, analysis, and interpretation of the data, and in the preparation, review, or approval of the manuscript.
Additional Contributions: Mark Totten, MS, RAND Corporation, provided assistance with data preparation. He was not compensated.