Submitted for Publication: March 22, 2011; final revision received August 30, 2011; accepted September 7, 2011.
Author Contributions: Drs Zhang, Branstetter, and Ferris had full access to all 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: Zhang and Ferris. Acquisition of data: Zhang, Branstetter, Beswick, and Maxwell. Analysis and interpretation of data: Zhang, Branstetter, Gooding, and Ferris. Drafting of the manuscript: Zhang, Beswick, Maxwell, and Ferris. Critical revision of the manuscript for important intellectual content: Zhang, Branstetter, Beswick, Gooding, and Ferris. Statistical analysis: Branstetter and Gooding. Obtained funding: Ferris. Administrative, technical, and material support: Zhang, Maxwell, and Ferris. Study supervision: Branstetter and Ferris.
Financial Disclosure: None reported.
Previous Presentation: This study was presented at the American Head and Neck Society 2011 Annual Meeting; April 28, 2011; Chicago, Illinois.
Additional Contributions: Jennifer Hetrick, RHIA, CRT, assisted in extracting extract data from the head and neck cancer database at the University of Pittsburgh Medical Center Network Cancer Registry.