1. Department of Otolaryngology–Head & Neck Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
2. Department of Pediatrics, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
3. Department of Pathology, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
4. Division of Otolaryngology, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA