Author Contributions: Drs Tan and Ricordi had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Tan, Wu, Xu, Liao, Zheng, Pileggi, Ricordi.
Acquisition of data: Tan, Wu, Liao, Sun, Chen, Yang, Cai, Gao.
Analysis and interpretation of data: Tan, Wu, Xu, Liao, Zheng, Messinger, Pileggi, Ricordi.
Drafting of the manuscript: Tan, Wu, Xu, Liao, Zheng, Messinger, Pileggi.
Critical revision of the manuscript for important intellectual content: Tan, Wu, Xu, Liao, Zheng, Messinger, Sun, Chen, Yang, Cai, Gao, Pileggi, Ricordi.
Statistical analysis: Tan, Wu, Xu, Liao, Zheng, Messinger, Pileggi.
Obtained funding: Tan.
Administrative, technical, or material support: Tan, Wu, Liao, Sun, Chen, Yang, Cai, Gao.
Study supervision: Tan, Ricordi.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: This study was supported in part by grants 2009Y4001 from the Key Science Research Project and 2008J1006 from the Key Laboratory, both of Fujian Province, China.
Role of the Sponsor: The funding agencies had no involvement in design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript.
Additional Contributions: We thank all the patients whose participation made this study possible.
This article was corrected for errors on March 21, 2012.