1. Departments of Otolaryngology–Head and Neck Surgery and Pediatrics, Stanford University, Palo Alto, CA
2. Department of Otolaryngology–Head and Neck Surgery, Medical College of Wisconsin, Milwaukee, WI
3. Department of Otolaryngology–Head and Neck Surgery, Oregon Health and Sciences Medical School, University of Colorado, Denver, CO
4. Departments of Otolaryngology–Head and Neck Surgery, Oregon Health and Sciences University. Portland, OR