1. Department of Otolaryngology–Head and Neck Surgery University of Mississippi Medical Center Jackson Mississippi USA
2. Department of Otolaryngology–Head and Neck Surgery Thomas Jefferson University Philadelphia Pennsylvania USA
3. Department of Otolaryngology–Head and Neck Surgery University of Colorado Anschutz Medical Campus Aurora Colorado USA
4. Department of Otolaryngology–Head and Neck Surgery, Medical College of Georgia Augusta University Augusta Georgia USA