Submitted for Publication: April 17, 2014; final revision received July 16, 2014; accepted August 4, 2014.
Published Online: September 25, 2014. doi:10.1001/jamaoto.2014.2060.
Author Contributions: Drs Lee and Welham 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.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: Welham.
Statistical analysis: Welham.
Obtained funding: Welham.
Administrative, technical, or material support: All authors.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by grants R01 DC004428 and R01 DC010777 from the National Institute on Deafness and other Communication Disorders and a grant from the Soonchunhyang University Research Fund.
Role of the Funder/Sponsor: The funding organizations 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 135th Annual Meeting of the American Laryngological Association; May 15, 2014; Las Vegas, Nevada.
Additional Contributions: Glen E. Leverson, PhD, Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, provided statistical consultation. No financial compensation was provided.