1. Department of Otolaryngology - Head and Neck Surgery, Mid-Atlantic Permanente Medical Group, McLean, Virginia
2. Department of Surgery, Uniformed Services University, Bethesda, Maryland
3. Department of Otolaryngology - Head and Neck Surgery, Uniformed Services University, Bethesda, Maryland
4. Department of Otolaryngology Head and Neck Surgery, Johns Hopkins Medical Institute, Baltimore, Maryland