1 School of Cardiovascular and Metabolic Medicine and Sciences, King's College London and King's College Hospital, London SE5 9NU, UK. Electronic address: francesco.rubino@kcl.ac.uk.
2 Centre for Obesity Research, Division of Medicine, University College London, London, UK; National Institute for Health and Care Research, UCLH Biomedical Research Centre, London, UK.
3 The Lancet Diabetes & Endocrinology, London, UK.
4 Università Cattolica del Sacro Cuore, Rome, Italy; Department of Medical and Surgical Sciences, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy.
5 Diabetes Complications Research Centre, University College Dublin, Ireland; Diabetes Research Centre, Ulster University, UK.
6 University of Cambridge Metabolic Research Laboratories and NIHR Cambridge Biomedical Research Centre, Wellcome-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, UK.
7 Obesity Prevention and Care Center Contrepoids, Service of Endocrinology, Diabetology, Nutrition and Therapeutic Patient Education, Department of Medicine, University Hospital of Geneva and University of Geneva, Geneva, Switzerland.
8 School of Population Health, Royal College of Surgeons of Ireland, University of Medicine and Health Sciences, Dublin, Ireland.
9 Division of Metabolism, Endocrinology and Nutrition, University of Washington, Seattle, WA, USA.