1Department of Infectious Diseases Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
2The Health Research Unit Zimbabwe (THRU-Zim), Biomedical Research and Training Institute, Harare, Zimbabwe
3MRC Nutrition and Bone Health Research Group, University of Cambridge, Cambridge, UK
4Population Health Sciences, Bristol Medical School, Bristol, UK
5Department of Clinical Research, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
6Child and Adolescent Health Unit, Faculty of Medicine and Health Sciences, University of Zimbabwe, Harare, Zimbabwe
7South African Medical Research Council/Wits Developmental Pathways for Health Research Unit (DPHRU), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
8MRC Lifecourse Epidemiology Centre, University of Southampton, Southampton, UK
9MRC Unit, The Gambia at LSHTM, Banjul, Gambia
10Musculoskeletal Research Unit, Bristol Medical School, University of Bristol, Bristol, UK