1. Georgetown University School of MedicineWashington, District of ColumbiaUSA
2. Howard University College of MedicineWashington, District of ColumbiaUSA
3. University of Pittsburgh School of MedicinePittsburghPennsylvaniaUSA
4. Department of Otolaryngology‐HNSMedstar Georgetown University HospitalWashingtonDistrict of ColumbiaUSA