1. Drexel University College of Medicine, Philadelphia, PA
2. Department of Otolaryngology—Head and Neck Surgery, University of Minnesota, Minneapolis, MN
3. Department of Otolaryngology—Head and Neck Surgery, Valegos College of Physicians and Surgeons, NewYork-Presbyterian/Columbia University Irving Medical Center, New York, NY
4. Division of Pediatric Otolaryngology, Children’s Hospital of Philadelphia, Philadelphia, PA
5. Department of Otorhinolaryngology/Head and Neck Surgery, University of Pennsylvania, Philadelphia, PA
6. Department of Otolaryngology—Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA
7. Department of Otolaryngology—Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, TN.