1. Oakland University William Beaumont School of Medicine Rochester Michigan U.S.A.
2. Head and Neck Institute Cleveland Clinic Cleveland Ohio U.S.A.
3. Department of Otolaryngology–Head and Neck Surgery Wayne State University School of Medicine Detroit Michigan U.S.A.
4. Department of Otolaryngology–Head and Neck Surgery University of Colorado Medical School Aurora Colorado U.S.A.
5. Barbara Ann Karmanos Cancer Institute Wayne State University School of Medicine Detroit Michigan U.S.A.
6. Hackensack Meridian Health Hackensack University Medical Center Hackensack New Jersey U.S.A.