1. Department of Paediatrics; Addenbrooke's Hospital, Cambridge University Hospitals NHS Trust; Cambridge
2. Hammersmith Hospital, North West Thames Foundation School; London U.K
3. Department of Otolaryngology; Boston Children's Hospital; Department of Otology & Laryngology, Harvard Medical School; Boston
4. The Clinical Research Center, Boston Children's Hospital; Boston
5. Department of Otolaryngology-Head and Neck Surgery; Johns Hopkins School of Medicine; Baltimore Maryland
6. Department of Otolaryngology and Cardiology; Boston Children's Hospital; Boston
7. Ferkauf Graduate School of Psychology; Yeshiva University; New York New York U.S.A
8. Division of General Pediatrics; Boston Children's Hospital, Boston, Harvard Medical School; Boston Massachusetts