1. Cochrane ENT; Nuffield Department of Surgical Sciences, University of Oxford; Oxford UK
2. Department of Otolaryngology Head and Neck Surgery; St Vincent’s University Hospital; Dublin 4 Ireland
3. Oxford University Hospitals NHS Foundation Trust; Oxford UK
4. Department of Medicine; Norwich Medical School, University of East Anglia; Norwich UK
5. ENT Department; Guy's Hospital; London UK
6. Cochrane UK; Oxford UK