1. Research Department of Primary Care & Population Health; UCL Institute of Epidemiology & Health Care; London UK
2. Population, Policy & Practice Programme; UCL Institute of Child Health; London UK
3. UCLH Adolescent Diabetes & Obesity; UCL Institute of Child Health; London UK
4. UCL Hospitals, NHS Foundation Trust; London UK
5. Department of Medicine; UCL Centre for Obesity Research, Rayne Institute; London UK
6. UCLH Bariatric Centre for Weight Management and Metabolic Surgery; London UK
7. National Institute of Health Research, UCLH Biomedical Research Centre; London UK
8. Department of Non-communicable Disease Epidemiology; London School of Hygiene and Tropical Medicine; London UK
9. Department of Applied Health Research; UCL Institute of Epidemiology & Health Care; London UK