1. Department of Otolaryngology–Head and Neck Surgery, University of California, San Francisco, San Francisco, California, USA
2. American Academy of Otolaryngology–Head and Neck Surgery Foundation, Alexandria, Virginia, USA
3. Department of Otolaryngology, Walter Reed National Military Medical Center, Bethesda, Maryland, USA
4. Division of Otolaryngology–Head & Neck Surgery, Duke University Medical Center, Durham, North Carolina, USA
5. Department of Otolaryngology–Head and Neck Surgery, University of Washington, Seattle, Washington, USA
6. Division of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA
7. Department of Otolaryngology–Head and Neck Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA
8. Departments of Pediatrics and Epidemiology & Biostatistics, Philip R. Lee Institute for Health Policy, University of California, San Francisco, San Francisco, California, USA