Influence of vitamin D supplementation on bone mineral content, bone turnover markers, and fracture risk in South African schoolchildren: multicenter double-blind randomized placebo-controlled trial (ViDiKids).

Address: Desmond Tutu HIV Centre, Institute of Infectious Diseases & Molecular Medicine, University of Cape Town, Observatory, Cape Town 7925, Western Cape, South Africa.; Department of Medicine, University of Cape Town, Observatory, Cape Town 7925, Western Cape, South Africa.; Division of Physiological Sciences, Department of Human Biology, Faculty of Health Sciences, Health through Physical Activity, Lifestyle and Sport Research Centre (HPALS), University of Cape Town, Newlands, Cape Town 7700, Western Cape, South Africa.; Department of Paediatrics, SAMRC/Wits Developmental Pathways for Health Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Parktown, Johannesburg 2193, Gauteng, South Africa.; Wolfson Institute of Population Health, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom.; Desmond Tutu HIV Centre, Institute of Infectious Diseases & Molecular Medicine, University of Cape Town, Observatory, Cape Town 7925, Western Cape, South Africa.; Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, United Kingdom.; Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, Cape Town 7925, Western Cape, South Africa.; Infectious Diseases and Immune Defence Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.; Biostatistics Unit, SAFOODS Division, South African Medical Research Council, Tygerberg, Cape Town 7505, Western Cape, South Africa.; Division of Human Nutrition, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, Cape Town 7505, Western Cape, South Africa.; Department of Paediatrics and Child Health, Paediatric Infectious Diseases Unit, Red Cross War Memorial Children's Hospital, Rondebosch, Cape Town 7700, Western Cape, South Africa.; Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, United Kingdom.; Departments of Laboratory Medicine, Clinical Biochemistry and Departments of Diabetes and Endocrinology, Norfolk and Norwich University Hospital NHS Foundation Trust, Norwich NR4 7UY, United Kingdom.; MRC Lifecourse Epidemiology Centre, University of Southampton, Southampton SO16 6YD, United Kingdom.; NIHR Southampton Biomedical Research Centre, University of Southampton, Southampton SO16 6YD, United Kingdom.; University Hospital Southampton NHS Foundation Trust, Southampton SO16 6YD, United Kingdom.; Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, Cape Town 7925, Western Cape, South Africa.; The Francis Crick Institute, London NW1 1AT, United Kingdom.; Imperial College London, London W12 0NN, United Kingdom.