Affiliation: | 1. Department of Otolaryngology – Head & Neck Surgery, Queen's Hospital, , Romford, UK;2. National Institute of Health and Care Excellence (2013 Scholar), , London, UK;3. Dr Foster Intelligence Ltd, , London, UK;4. Department of Clinical Coding, Charing Cross Hospital, , London, UK;5. Academic Department of Surgery, Imperial College London, , London, UK;6. Department of Clinical Oncology, Charing Cross Hospital, , London, UK;7. Department of Oral & Maxillofacial Surgery, St Richard's Hospital, , Chichester, UK;8. Department of Plastic & Reconstructive Surgery, Charing Cross Hospital, , London, UK;9. The Royal National Throat Nose and Ear Hospital, , London, UK;10. Department of Otolaryngology ‐ Head & Neck Surgery, Royal London Hospital, , London, UK;11. Dr Foster Unit at Imperial College, Department of Primary Care and Public Health, School of Public Health, Imperial College London, , London, UK;12. Department of Otolaryngology – Head & Neck Surgery, Charing Cross Hospital, , London, UK |