1. Division of Head and Neck Surgery and Communication Sciences, Duke University Medical Center, Durham, North Carolina, USA
2. Department of Otolaryngology, University of Michigan, Ann Arbor, Michigan, USA
3. Duke Clinical Research Institute, Durham, North Carolina, USA
4. Division of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA
5. Division of Otolaryngology–Head and Neck Surgery, Department of Surgery, University of Connecticut Health Center, Farmington, Connecticut, USA
6. Department of Otolaryngology, University of Washington, Seattle, Washington, USA
7. Department of Otolaryngology, Hofstra North Shore–LIJ School of Medicine, Long Island Jewish Medical Center, New Hyde Park, New York, USA
8. Department of Otolaryngology–Head and Neck Surgery, Oregon Health and Science University, Portland, Oregon, USA