1. Department of Otolaryngology–Head and Neck Surgery University of Alabama at Birmingham Birmingham Alabama USA
2. School of Medicine University of California Irvine School of Medicine Irvine California USA
3. School of Medicine University of Alabama at Birmingham Heersink School of Medicine Birmingham Alabama USA
4. Department of Otolaryngology–Head and Neck Surgery University of Colorado School of Medicine Aurora Colorado USA
5. Department of Otolaryngology–Head and Neck Surgery University of California Irvine Irvine California USA
6. O'Neal Comprehensive Cancer Center Birmingham Alabama USA