1. Department of Otolaryngology–Head and Neck SurgeryUniversity of South Florida Tampa Florida U.S.A
2. Department of Health Policy and ManagementUniversity of South Florida Tampa Florida U.S.A
3. Department of Otolaryngology–Head and Neck SurgeryIcahn School of Mount Sinai New York, New York U.S.A
4. Department of Otolaryngology, Harvard Medical SchoolMassachusetts Eye and Ear Infirmary Boston Massachusetts U.S.A
5. North Shore ENT Danvers Massachusetts U.S.A
6. Department of NeurosurgeryChildren's Hospital of Philadelphia Philadelphia Pennsylvania U.S.A
7. Department of NeurosurgeryUniversity of Pennsylvania Philadelphia Pennsylvania U.S.A
8. Department of RadiologyChildren's Hospital of Philadelphia Philadelphia Pennsylvania U.S.A
9. Department of Otorhinolaryngology–Head and Neck SurgeryUniversity of Pennsylvania Philadelphia Pennsylvania U.S.A.