1. Department of Otolaryngology–Head and Neck SurgerySchool of MedicineUniversity of WashingtonSeattleWashingtonUSA
2. Department of Otolaryngology–Head and Neck SurgerySan Antonio Uniformed Services Health Education ConsortiumJoint Base San Antonio–Ft Sam HoustonTexasUSA
3. Seattle Children’s Hospital and Research InstituteSeattleWashingtonUSA