1. Department of Otolaryngology–Head and Neck Surgery University of Texas Southwestern Medical Center Dallas Dallas Texas USA
2. Department of Otolaryngology–Head and Neck Surgery, Emory University Atlanta Atlanta Georgia USA
3. Department of Otolaryngology–Head and Neck Surgery, McGovern Medical School at the University of Texas Health Science Center at Houston Houston Texas USA
4. Department of Otorhinolaryngology, Mayo Clinic Rochester Rochester Minnesota USA
5. Department of Otolaryngology–Head and Neck Surgery Harvard Medical School Boston Massachusetts USA
6. Department of Otolaryngology–Head and Neck Surgery, Mayo Clinic in Arizona Phoenix Phoenix Arizona USA
7. Department of Otolaryngology–Head and Neck Surgery, Johns Hopkins University Baltimore Baltimore Maryland USA
8. Department of Otolaryngology–Head and Neck Surgery, University of Utah Salt Lake City Salt Lake City Utah USA