1. Nuffield Department of Surgical Sciences; University of Oxford; Oxford UK
2. Cochrane ENT; Nuffield Department of Surgical Sciences, University of Oxford; Oxford UK
3. Telethon Kids Institute, The University of Western Australia; Perth Australia
4. Division of Paediatrics; The University of Western Australia; Perth Australia
5. Wesfarmers Centre of Vaccines and Infectious Diseases; Telethon Kids Institute; Perth Australia
6. Department of Otolaryngology; Brighton and Sussex University Hospitals NHS Trust; Brighton UK
7. evidENT, Ear Institute; University College London; London UK
8. Cochrane UK; Oxford UK
9. Telethon Kids Institute; The University of Western Australia; Perth Australia