1. National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Ropewalk House, Nottingham, UK;
2. Hearing Sciences, Division of Clinical Neuroscience, School of Medicine, University of Nottingham, Nottingham, UK;
3. East Suffolk and North Essex NHS Foundation Trust, Colchester General Hospital, Colchester, UK;
4. Cochrane Skin, Centre of Evidence Based Dermatology, University of Nottingham, Nottingham, UK;
5. Nottingham Audiology Services, Nottingham University Hospitals NHS Trust, Nottingham, UK;
6. University of Nottingham Malaysia, Semeniyh, Malaysia;
7. Department of Clinical Psychological Science, Maastricht University, Maastricht, The Netherlands;
8. Adelante, Centre of Expertise in Rehabilitation and Audiology, Hoensbroek, The Netherlands;
9. Cochrane ENT, Nuffield Department of Surgery, University of Oxford, Oxford, UK