1. Non‐Communicable Diseases Research Unit South African Medical Research Council Cape Town South Africa
2. South African Medical Research Council/WITS Developmental Pathways for Health Research Unit (DPHRU), Department of Paediatrics Faculty of Health Sciences, University of the Witwatersrand Johannesburg South Africa
3. Health through Physical Activity, Lifestyle and Sport Research Centre (HPALS), FIMS International Collaborating Centre of Sports Medicine, Division of Physiological Sciences, Department of Human Biology Faculty of Health Sciences, University of Cape Town Cape Town South Africa
4. Department of Chemical Pathology National Health Laboratory Service and School of Pathology, Faculty of Health Sciences, University of the Witwatersrand Johannesburg South Africa
5. Oxford Centre for Diabetes, Endocrinology and Metabolism (OCDEM), NIHR Oxford Biomedical Research Centre, OUH Foundation Trust University of Oxford Oxford UK
6. Department of Public Health and Clinical Medicine Medicine, Umeå University Umeå Sweden