Submitted for Publication: September 16, 2011; final revision received January 30, 2012; accepted January 24, 2012.
Author Contributions: All authors 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: King, Chun, and Sulman. Acquisition of data: Chun. Analysis and interpretation of data: King and Chun. Drafting of the manuscript: King and Chun. Critical revision of the manuscript for important intellectual content: King, Chun, and Sulman. Administrative, technical, and material support: Chun and Sulman. Study supervision: Chun and Sulman.
Financial Disclosure: None reported.
Funding/Support: The statistical support is supported, in part, by grant 1UL1RR031973 from the clinical and translational Science Award program of the national Center for Research Resources, National Institutes of Health.
Previous Presentation: This study was a poster presentation at the Annual Meeting of the American Society of Pediatric Otolaryngology; May 23, 2009; Seattle Washington.
Additional Contribution: We thank Shi Zhao, MS, for biostatistics consultation.