Author Contributions: Dr Halpern 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: Halpern, Abt.
Acquisition of data: Barnes, Hasz.
Analysis and interpretation of data: Halpern.
Drafting of the manuscript: Halpern, Barnes, Abt.
Critical revision of the manuscript for important intellectual content: Halpern, Hasz, Abt.
Statistical analysis: Halpern.
Obtained funding: Halpern.
Administrative, technical, or material support: Halpern, Barnes, Hasz.
Study supervision: Halpern, Hasz, Abt.
Financial Disclosures: None reported.
Funding/Support: Dr Halpern was supported by a Greenwall Foundation Faculty Scholar Award in Bioethics and by K08HS018406 from the Agency for Healthcare Research and Quality.
Role of the Sponsors: The funding sources 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: David A. Axelrod, MD, MBA (Dartmouth-Hitchcock Medical Center); Anthony M. D’Alessandro, MD (University of Wisconsin); Robert B. Love, MD (Loyola University); Joshua D. Mezrich, MD (University of Wisconsin); Kim M. Olthoff, MD (Hospital of the University of Pennsylvania); and Abraham Shaked, MD, PhD (Hospital of the University of Pennsylvania), provided expertise regarding the designation of potential donors as optimal, suboptimal, or ineligible. None received compensation for their roles in this study.