Submitted for Publication: June 2, 2014; final revision received August 11, 2014; accepted September 8, 2014.
Published Online: November 13, 2014. doi:10.1001/jamaoto.2014.2830.
Study concept and design: W. S. Kim, Koh, Choi.
Acquisition, analysis, or interpretation of data: W. S. Kim, Ban, Chang, Byeon, H. Kim, Han, Koh.
Drafting of the manuscript: W. S. Kim, Ban, Chang, H. Kim, Han.
Critical revision of the manuscript for important intellectual content: Byeon, Koh, Choi.
Statistical analysis: W. S. Kim, Ban, Chang, H. Kim, Han.
Administrative, technical, or material support: Byeon, Koh.
Study supervision: Koh, Choi.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This study was presented at the Fifth World Congress of the International Federation of Head and Neck Oncologic Societies and the Annual Meeting of the American Head & Neck Society; July 29, 2014; New York, New York.
Additional Information: Drs Chang and Koh contributed equally to this work.
Correction: This article was corrected on December 3, 2014, to add the Additional Information to the end matter specifying that Drs Chang and Koh contributed equally to this work.