1. Department of Otolaryngology-Head and Neck Surgery, Henry Ford Hospital, Detroit, Michigan
2. Department of Otolaryngology—Head and Neck Surgery, University of Virginia, Charlottesville, Virginia
3. Department of Otolaryngology—Head and Neck Surgery, Oregon Health and Science University, Portland, Oregon
4. Department of Radiology and Otolaryngology-Head and Neck Surgery, Oregon Health and Science University, Portland, Oregon
5. Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, California