1. Department of Otolaryngology–Head and Neck Surgery The Ear, Nose, Throat and Plastic Surgery Associates Orlando Florida U.S.A.
2. Department of Otolaryngology–Head and Neck Surgery Vanderbilt University Medical Center Nashville Tennessee U.S.A.
3. Department of Otolaryngology–Head and Neck Surgery University of Washington Seattle Washington U.S.A.
4. Department of Otolaryngology–Head and Neck Surgery University of Michigan Ann Arbor Michigan U.S.A.
5. Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear Infirmary Harvard Medical School Boston Massachusetts U.S.A.
6. Department of Otolaryngology–Head and Neck Surgery San Antonio Military Medical Center San Antonio Texas U.S.A.
7. Department of Anesthesiology Vanderbilt University Medical Center Nashville Tennessee U.S.A.