1. ENT Department Barts Health NHS Trust London UK
2. UCL Cancer Institute University College London London UK
3. Division of Surgery and Interventional Science University College London London UK
4. CRUK & UCL Cancer Trials Centre University College London London UK
5. Department of Otolaryngology University of San Diego School of Medicine San Diego California USA
6. Centre for Obesity Research University College London London UK
7. Bariatric Centre for Weight Management and Metabolic Surgery University College London Hospitals NHS Trust London UK
8. National Institute for Health Research UCLH Biomedical Research Centre London UK
9. Guy's Hospital Guy's and St. Thomas’ NHS Foundation Trust London UK
10. The Norfolk Smell & Taste Clinic Norfolk & Waveney ENT Service Norwich UK
11. Norwich Medical School University of East Anglia Norwich UK
12. Royal National ENT Hospital UCLH Foundation Trust London UK
13. Department of Otolaryngology ‐ Head and Neck Surgery Stanford University School of Medicine Palo Alto California USA
14. Department of Otolaryngology ‐ Head and Neck Surgery Medical University of South Carolina Charleston SC USA