1. Department of Otorhinolarygology–Head and Neck Surgery, Rush University Medical Center, Chicago, Illinois, United States
2. Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California, United States
3. Department of Otorhinolarygology–Head and Neck Surgery, The University of Pennsylvania, Philadelphia, Pennsylvania, United States
4. Department of Otolaryngology–Head and Neck Surgery, Eastern Virginia Medical School, Norfolk, Virginia, United States
5. Department of Otolaryngology, Vanderbilt University School of Medicine, Nashville, Tennessee, United States