1. Department of Otolaryngology–Head and Neck Surgery Walter Reed National Military Medical Center Bethesda Maryland U.S.A.
2. F. Edward Hebert School of Medicine Uniformed Services University of the Health Sciences Bethesda Maryland U.S.A.
3. Department of Otorhinolaryngology–Head and Neck Surgery Ochsner Clinic New Orleans Louisiana U.S.A.
4. Ochsner Clinical School University of Queensland School of Medicine New Orleans Louisiana U.S.A.
5. Department of Surgery Uniformed Services University of the Health Sciences Bethesda Maryland U.S.A.