1. Department of Otolaryngology–Head and Neck SurgeryMayo ClinicRochesterMinnesotaUSA
2. Department of Otolaryngology–Head and Neck SurgeryMiller School of MedicineUniversity of MiamiMiamiFloridaUSA
3. Department of Otolaryngology–Head and Neck SurgeryVanderbilt University Medical CenterNashvilleTennesseeUSA
4. Department of Otolaryngology–Head and Neck SurgeryUniversity of North CarolinaChapel HillNorth CarolinaUSA
5. Department of Otolaryngology–Head and Neck SurgeryUniversity of MichiganAnn ArborMichiganUSA
6. Department of Otolaryngology–Head and Neck SurgerySchool of MedicineJohns Hopkins UniversityBaltimoreMDUSA
7. Department of Otolaryngology–Head and Neck SurgeryWashington University in St Louis School of MedicineSt LouisMissouriUSA