1. Population Health Sciences, Bristol Medical School University of Bristol Bristol UK
2. MRC Nutrition and Bone Health Research Group University of Cambridge Cambridge UK
3. MRC Lifecourse Epidemiology Centre University of Southampton, Southampton General Hospital Southampton UK
4. Department of Medicine, School of Clinical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash Medical Centre Monash University Clayton Australia
5. MRC Unit The Gambia at London School of Hygiene and Tropical Medicine Banjul Gambia
6. National Institute for Health Research (NIHR) Musculoskeletal Biomedical Research Unit University of Oxford Oxford UK