Author Contributions: Dr Redberg 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: Chen, Dhruva, Redberg.
Acquisition of data: Chen, Dhruva, Redberg.
Analysis and interpretation of data: Chen, Dhruva, Redberg.
Drafting of the manuscript: Chen, Dhruva.
Critical revision of the manuscript for important intellectual content: Chen, Dhruva, Redberg.
Statistical analysis: Chen.
Study supervision: Redberg.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Redberg reported being a member of the US Food and Drug Administration Circulatory System Devices Panel and a member of the California Technology Assessment Forum. Dr Redberg is the editor of the Archives of Internal Medicine. No other conflicts of interest were reported.
Additional Contributions: We thank Jean Slutsky, PA, MSPH (Center for Outcomes and Evidence at Agency for Healthcare Research and Quality), and Vanessa Jacoby, MD, MAS (University of California, San Francisco, Department of Obstetrics, Gynecology, and Reproductive Sciences), for their comments and contributions. Neither received compensation for their contributions.