Author Contributions: Dr Zinner 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: Zinner, Campbell.
Acquisition of data: Zinner, Campbell.
Analysis and interpretation of data: Zinner.
Drafting of the manuscript: Zinner, Campbell.
Critical revision of the manuscript for important intellectual content: Zinner, Campbell.
Statistical analysis: Zinner.
Obtained funding: Campbell.
Administrative, technical, or material support: Zinner, Campbell.
Study supervision: Campbell.
Financial Disclosures: Dr Zinner reported being partially supported by Brandeis University's Health Industry Forum, an independent policy consortium of major health care insurers, delivery systems, and biopharmaceutical and medical device firms. No other disclosures were reported.
Funding/Support: This research was supported by grant 1R01GM074915-01 from the National Human Genome Research Institute of the National Institutes of Health (E.G.C.).
Role of the Sponsor: The sponsors had no role in the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.
Additional Contributions: Sandra Feibelmann, MPH, Institute for Health Policy, Massachusetts General Hospital, provided research assistance in assembling the survey sample, for which she was compensated.