[1] Univ Alabama Birmingham, Dept Otolaryngol Head & Neck Surg, Birmingham, AL USA
[2] Univ Alabama Birmingham, Gregory Fleming James Cyst Fibrosis Res Ctr, Birmingham, AL USA
[3] Vet Affairs, Dept Surg, Div Otolaryngol, Birmingham, AL USA
[4] Univ Alabama Birmingham, Dept Otolaryngol Head & Neck Surg, 1155 Fac Off Tower,510 20th St South, Birmingham, AL 35233 USA