1. Department of Otolaryngology–Head and Neck Surgery, Thomas Jefferson University Hospital, Philadelphia, Philadelphia, USA
2. Department of Otolaryngology–Head and Neck Surgery, Tripler Army Medical Center, Honolulu, Hawaii, USA
3. Division of Pediatric Otolaryngology, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
4. Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
5. Department of Otolaryngology–Head and Neck Surgery, University of Rochester Medical Center, Rochester, New York, USA