1. Department of Otolaryngology–Head and Neck Surgery, University of Kansas School of Medicine, Kansas City
2. Division of Head and Neck Oncology, Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston
3. Department of Otolaryngology–Head and Neck Surgery, Washington University School of Medicine, St Louis, Missouri
4. Department of Otolaryngology–Head and Neck Surgery, Oregon Health Sciences University, Portland