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