The Institute of Metabolism and Systems Research, Centre for Endocrinology, Diabetes and Metabolism, The Medical School, University of Birmingham, Birmingham, UK. Department of Diabetes, The Queen Elizabeth Hospital, Birmingham, UK. Division of Medicine, University of Bristol, Bristol, UK. Institute of Applied Health Research, University of Birmingham, Birmingham, UK. School for Health, University of Bath, Bath, UK. Department of Psychology, School of Science and Technology, Middlesex University, London, UK. Centre for Exercise, Nutrition and Health Sciences, University of Bristol, Bristol, UK. NIHR Bristol Biomedical Research Unit in Nutrition, Diet and Lifestyle, University Hospitals Bristol Education and Research Centre, Bristol, UK. College of Life and Environmental Sciences (CLES), University of Exeter, Exeter, UK. Institute of Health Research, University of Exeter, Exeter, UK. University of Exeter, Medical School, University of Exeter, Exeter, UK.