Submitted for Publication: July 12, 2011; final revision received September 28, 2011; accepted October 9, 2011.
Author Contributions: Dr Shargorodsky had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Shargorodsky, Eavey, and G. C. Curhan. Analysis and interpretation of data: Shargorodsky, S. G. Curhan, Henderson, and G. C. Curhan. Drafting of the manuscript: Shargorodsky. Critical revision of the manuscript for important intellectual content: Shargorodsky, S. G. Curhan, Henderson, Eavey, and G. C. Curhan. Statistical analysis: Shargorodsky and S. G. Curhan. Obtained funding: Eavey. Administrative, technical, and material support: Henderson and G. C. Curhan. Study supervision: Eavey and G. C. Curhan.
Financial Disclosure: None reported.
Funding/Support: This work was supported in part by the Massachusetts Eye and Ear Infirmary Foundation and by Vanderbilt University School of Medicine Development Funds.
Previous Presentation: This study was presented in part at the American Society of Pediatric Otolaryngology Section of the Combined Otolaryngological Spring Meetings; April 29, 2011; Chicago, Illinois.