Accepted for Publication: July 29, 2013.
Published Online: April 2, 2014. doi:10.1001/jamasurg.2013.4648.
Study concept and design: Huang, Lau, Zhou, Shen.
Acquisition, analysis, or interpretation of data: Huang, Shen, Pan, Yuan, Wu.
Drafting of the manuscript: Huang, Lau, Pan.
Critical revision of the manuscript for important intellectual content: Lau, Zhou, Shen, Yuan, Wu.
Statistical analysis: Lau, Shen, Pan.
Obtained funding: Huang, Zhou, Shen.
Administrative, technical, or material support: Zhou, Shen.
Study supervision: Huang, Lau, Shen.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by grants 2012ZX10002010 and 2012ZX10002016 from the State Key Project on Infectious Diseases of China; by contract 81201940 from the Science Fund for Creative Research Groups, National Natural Science Foundation of China (NSFC); and by contract 81201555 from the NSFC.
Role of the Sponsor: The funding sources 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.