Submitted for Publication: May 18, 2011; final revision received July 26, 2011; accepted July 27, 2011.
Author Contributions: Dr Glastonbury 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: Groppo, El-Sayed, and Glastonbury. Acquisition of data: Groppo, Aiken, and Glastonbury. Analysis and interpretation of data: Groppo, Aiken, and Glastonbury. Drafting of the manuscript: Groppo and El-Sayed. Critical revision of the manuscript for important intellectual content: Groppo, Aiken, and Glastonbury. Statistical analysis: Groppo. Administrative, technical, and material support: Glastonbury. Study supervision: El-Sayed, Aiken, and Glastonbury.
Financial Disclosure: None reported.
Funding/Support: This work was supported in part by National Institutes of Health/National Center for Research Resources UCSF-CTSI grant number UL1 RR024131.
Disclaimer: The contents of this article are solely the responsibility of the authors and do not necessarily represent the official views of the National Institutes of Health.
Previous Presentation: This work was presented in poster form at the Triological Society Poster Session during the Combined Otolaryngology Spring Meetings (COSM); April 28–May 2, 2010; Las Vegas, Nevada. It received the First Place Sinus-Rhinology Poster Award in the scientific poster competition.
Additional Contributions: Erin Madden, MPH, and John Kornak, PhD, of the University of California, San Francisco, Clinical and Translational Sciences Institute (UCSF CTSI) assisted with statistical analysis.