Submitted for Publication: May 4, 2014; final revision received June 13, 2014; accepted July 20, 2014.
Published Online: September 18, 2014. doi:10.1001/jamaoto.2014.2013.
Study concept and design: Cao, Luo, Gao, G. Z. Xu.
Acquisition, analysis, or interpretation of data: Yi, Huang, Li, Xiao, Liu, Z. G. Xu, Tang, Cao, Luo, Gao, G. Z. Xu.
Drafting of the manuscript: Cao, Luo.
Critical revision of the manuscript for important intellectual content: Yi, Huang, Li, Xiao, Liu, Z. G. Xu, Tang, Gao, G. Z. Xu.
Statistical analysis: Cao, Yi, Huang, Li, Xiao, Liu, Z. G. Xu, Tang.
Administrative, technical, or material support: Yi, Huang, Li, Xiao, Liu, Z. G. Xu, Tang.
Study supervision: Luo, Gao, G. Z. Xu.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by grants from Health and Medical Development Foundation of China (2009-05) (Dr Luo).
Role of the Funder/Sponsor: The funding institution 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.
Previous Presentation: This study was presented at the 2014 Multidisciplinary Head and Neck Cancer Symposium; February 20, 2014; Scottsdale, Arizona.