1 School of Psychology, University of Leeds, Leeds LS2 9JU, UK; Scaled Insights, Nexus, University of Leeds, Leeds, UK. Electronic address: s.w.flint@leeds.ac.uk.
2 Centre for Obesity Research, University College London, London, UK; Bariatric Centre for Weight Management and Metabolic Surgery, University College London Hospital NHS Trust, London, UK; UCLH Biomedical Research Centre, National Institute of Health Research, London, UK.
3 Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Obesity and Eating Disorders Clinic, Department of Endocrinology and Metabolism, Mexico City, Mexico; Obesidades SC, Mexico City, Mexico.
4 Institute of Applied Health Research, University of Birmingham, Birmingham, UK; Department of Diabetes and Endocrinology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK; Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partners, Birmingham, UK.