Vitamin D supplementation to prevent acute respiratory infections: individual participant data meta-analysis.

Address: Centre for Primary Care and Public Health, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.; Asthma UK Centre for Applied Research, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.; Centre for Primary Care and Public Health, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.; Bone Mineral Research Center, Winthrop University Hospital, Mineola, NY, USA.; Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden.; Deptartment of Exercise, Lifestyle and Nutrition Clinic, Edmond and Lily Safra Children's Hospital, Tel Hashomer, Israel.; Pediatric Highly Intensive Care Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy.; Department of Nutrition, Harvard School of Public Health, Boston, MA, USA.; Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, CO, USA.; Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada.; Department of Paediatrics: Child and Youth Health, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.; Universitaire ziekenhuizen Leuven, Leuven, Belgium.; Centre for Asthma and Respiratory Diseases, University of Newcastle, Newcastle, NSW, Australia.; Dublin City University, Dublin, Ireland.; Centre for Military Medicine, Finnish Defense Forces, University of Tampere, Tampere, Finland.; Department of Public Health, Epidemiology and Biostatistics, Institute of Applied Health Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK.; Department of Statistics, The Pennsylvania State University, Hershey, PA, USA.; Department of Pathology, University of Otago, Christchurch, New Zealand.; Queensland Institute of Medical Research Berghofer Medical Research Institute, Brisbane, QLD, Australia.; Department of Epidemiology, Geisel School of Medicine at Dartmouth, Lebanon, NH, USA.; Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia.; Department of Pediatrics and Allergy, Medical University of Łódź, Łódź, Poland.; Institute of Home Economics, University of Delhi, New Delhi, India.; Division of Molecular Epidemiology, Jikei University School of Medicine, Tokyo, Japan.; Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.; Centre for Primary Care and Public Health, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.; Asthma UK Centre for Applied Research, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.; Medical Research Council and Asthma UK Centre in Allergic Mechanisms of Asthma, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.