| Affiliation: | 1. Department of Otolaryngology–Head and Neck Surgery, Eastern Virginia Medical School, Norfolk, Virginia, U.S.A.;2. Department of Otolaryngology–Head and Neck Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, U.S.A;3. Department of Surgery, Division of Otolaryngology–Head and Neck Surgery, Children's Hospital of San Diego, San Diego, California, U.S.A;4. Department of Surgery, Division of Otolaryngology–Head and Neck Surgery, University of Wisconsin, Madison, Wisconsin, U.S.A;5. British Columbia Children's Hospital, Vancouver, British Columbia, Canada;6. Department of Pediatric Otolaryngology, Montreal Children's Hospital, Montreal, Quebec, Canada |
