1. Department of Surgery, Oregon Health and Sciences University.
2. Division of Otolaryngology–Head and Neck Surgery, University of Alabama at Birmingham; the Department of Otolaryngology–Head and Neck Surgery, Oregon Health and Sciences University.
3. Department of University of North Carolina; the Department of Otolaryngology–Head and Neck Surgery, Oregon Health and Sciences University.
4. Department of University of California Davis; the Department of Otolaryngology–Head and Neck Surgery, Oregon Health and Sciences University.