Author Contributions: Dr Feng had full access to all of the data and takes responsibility for the integrity of the data integrity and the accuracy of the data analysis.
Study concept and design: Feng, Roberts, Bridges, Turka.
Data acquisition: Feng, Ekong, Lobritto, Demetris, Rosenthal, Alonso.
Data analysis and interpretation: Feng, Demetris, Philogene, Ikle, Poole, Bridges, Turka, Tchao.
Drafting of the manuscript: Feng.
Critical revision of the manuscript for important intellectual content: Feng, Ekong, Lobritto, Demetris, Roberts, Rosenthal, Alonso, Philogene, Ikle, Poole, Bridges, Turka, Tchao.
Statistical analysis: Philogene, Ikle, Poole.
Obtained funding: Feng.
Study Supervision: Feng, Bridges, Tchao.
Conflicts of Interest Disclosure: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Demetris reported that he has received fees as a consultant for pathology services related to clinical trials of immunosuppression drugs in adult de novo liver transplant recipients from Novartis/DCL Laboratory and Bristol-Myers Squibb; and is a co-inventor of Omnyx Digital Pathology Solution, a joint venture between the University of Pittsburgh Medical Center and General Electric to create a complete digital pathology solution. Dr Turka reported that he owns stock in and has a family member employed by Novartis. No other disclosures were reported.
Funding/Support: The Immune Tolerance Network, an international clinical research consortium founded by the National Institutes of Health, funded the study. This study also was supported by grant UL1 RR024131 from the National Institutes of Health/National Center for Research Resources awarded to the University of California, San Francisco, Clinical & Translational Science Institute.
Role of the Sponsors: The sponsors had a role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, and approval of the manuscript.
Disclaimer: The contents of this article are solely the responsibility of the authors and do not necessarily represent the official views of the National Institutes of Health.