1. Department of Otolaryngology–Head and Neck Surgery, Boston Medical Center/Boston University School of Medicine, Boston, Massachusetts.
2. Department of Otolaryngology–Head and Neck Surgery, New England Medical Center–Tufts University School of Medicine, Boston, Massachusetts.
3. OmniGuide Communication Inc., Cambridge, Massachusetts.
4. Department of Otolaryngology–Head and Neck Surgery, Mt. Sinai School of Medicine, New York, New York.