1. Department of Otolaryngology and Communication Enhancement
2. Department of Otolaryngology-Head and Neck Surgery; University of Western Ontario; London Ontario Canada
3. Department of Otology and Laryngology; Harvard Medical School; Boston Massachusetts
4. Department of Pulmonary Medicine
5. Department of Surgery; Boston Children's Hospital
6. Department of Otolaryngology; University of Vermont Medical Center; Burlington Vermont U.S.A