1. Centre for Obesity Research University College London London UK
2. Bariatric Centre for Weight Management and Metabolic Surgery University College London Hospitals NHS Trust London UK
3. National Institute for Health Research UCLH Biomedical Research Centre London UK
4. MRC Epidemiology Unit University of Cambridge Cambridge UK
5. The Hatter Cardiovascular Institute, Institute of Cardiovascular Science University College London London UK
6. Bariatric Surgery Department Homerton University Hospital NHS Trust London UK
7. Department of Surgery Whittington Health NHS Trust London UK