Accepted for Publication: June 30, 2013.
Published Online: September 9, 2013. doi:10.1001/jamainternmed.2013.10063.
Acquisition of data: Rosenthal, Li.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Rosenthal, Friedberg, Eastman, Schneider.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Rosenthal, Eastman, Li.
Obtained funding: Rosenthal, Schneider.
Administrative, technical, or material support: Eastman.
Study supervision: Rosenthal.
Qualitative analysis: Singer.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by The Commonwealth Fund, New York, New York.
Role of the Sponsor: The Commonwealth Fund 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; and decision to submit the manuscript for publication.