1 Nutrition and Bone Health Group, MRC Elsie Widdowson Laboratory, Cambridge, United Kingdom.
2 Faculty of Medicine, Nursing and Health Sciences, Department of Medicine, School of Clinical Sciences at Monash Health, Monash University, Monash Medical Centre, Clayton, VIC, Australia.
3 International Nutritional Group, London School of Hygiene and Tropical Medicine, London, United Kingdom.
4 Calcium, Vitamin D and Bone Health Group at MRC Unit The Gambia, Banjul, Gambia.
5 Faculty of Medicine and Health Sciences, Department of Medicine, University of East Anglia, Norwich, United Kingdom.
6 MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, United Kingdom.