Study concept and design: Hsia, Baker.
Acquisition of data: Hsia.
Analysis and interpretation of data: Hsia, Brownell, Wilson, Gordon, Baker.
Drafting of the manuscript: Hsia, Brownell, Wilson, Gordon.
Critical revision of the manuscript for important intellectual content: Hsia, Brownell, Baker.
Statistical analysis: Brownell, Wilson, Gordon, Baker.
Obtained funding: Hsia, Baker.
Administrative, technical, or material support: Hsia, Brownell, Gordon.
Study supervision: Hsia, Baker.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: This study was primarily funded by a grant from the California HealthCare Foundation. Additional financial support was provided by the National Center for Advancing Translational Sciences, National Institutes of Health, through University of California, San Francisco-Clinical and Translational Sciences Institute grant KL2 TR000143 (Dr Hsia) and the Robert Wood Johnson Foundation Physician Faculty Scholars Program (Dr Hsia).
Role of the Sponsor: The sponsors had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.