University of Bristol, Biomedical Research and Training Institute, London School of Hygiene & Tropical Medicine, University of KwaZulu-Natal, University of Bristol, University of Bristol, University of KwaZulu-Natal, London School of Hygiene & Tropical Medicine, University of Southampton, London School of Hygiene & Tropical Medicine, University of KwaZulu-Natal, London School of Hygiene & Tropical Medicine - Department of Clinical Research, University of Southampton - Medical Research Council Life Course Epidemiology Unit and University of Bristol - Musculoskeletal Research Unit

University of Bristol, University of Barcelona, University of KwaZulu-Natal, Biomedical Research and Training Institute, London School of Hygiene & Tropical Medicine, University of Bristol, University of Bristol, University of KwaZulu-Natal, London School of Hygiene & Tropical Medicine, University of Southampton - Medical Research Council Life Course Epidemiology Unit, University of Bristol, University of Southampton, University of KwaZulu-Natal, London School of Hygiene & Tropical Medicine - Department of Clinical Research, University of Southampton - Medical Research Council Life Course Epidemiology Unit and University of Bristol - Musculoskeletal Research Unit