1. Department of Otolaryngology–Head and Neck Surgery, Walter Reed National Military Medical Center, Bethesda, Maryland
2. Department of Otolaryngology–Head and Neck Surgery, University of Washington School of Medicine, Seattle
3. Department of Otolaryngology–Head and Neck Surgery, University of Washington School of Medicine, Seattle3Division of Laryngology, Department of Otolaryngology–Head and Neck Surgery, Johns Hopkins School of Medicine, Bethesda, Maryland