Author Contributions: Dr Rosenthal 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: Rosenthal, Frank,
Acquisition of data: Rosenthal, Li, Epstein.
Analysis and interpretation of data: Rosenthal,
Frank, Li, Epstein.
Drafting of the manuscript: Rosenthal, Frank,
Critical revision of the manuscript for important
intellectual content: Rosenthal, Frank, Li, Epstein.
Statistical analysis: Rosenthal, Frank, Li.
Obtained funding: Rosenthal, Frank, Epstein.
Administrative, technical, or material support:
Study supervision: Rosenthal.
Financial Disclosures: None reported.
Funding/Support: Financial support for this
research was provided by The Commonwealth Fund.
Role of the Sponsor: The Commonwealth Fund
played no role in the design and conduct of the study; collection, management,
analysis, and interpretation of the data; or in the preparation, review, or
approval of the manuscript.
Acknowledgment: We are grateful to Sam Ho,
MD, PacifiCare’s corporate medical director, and numerous others at
PacifiCare for providing access to the data and technical assistance.