Vitamin D supplementation to prevent acute respiratory infections: a systematic review and meta-analysis of aggregate data from randomised controlled trials

David A. Jolliffe, Carlos A. Camargo, John Sluyter, Mary Aglipay, John F. Aloia, Davaasambuu Ganmaa, Peter Bergman, Heike A. Bischoff‐Ferrari, Arturo Borzutzky, Camilla T. Damsgaard, Gal Dubnov‐Raz, Susanna Esposito, Clare Gilham, Adit A. Ginde, Inbal Golan‐Tripto, Emma C Goodall, Cameron Grant, Chris Griffiths, Anna Maria Hibbs, Wim Janssens, Anuradha Khadilkar, Ilkka Laaksi, Margaret T. Lee, Mark Loeb, Jonathon L. Maguire, Paweł Majak, David T. Mauger, Semira Manaseki‐Holland, David R. Murdoch, Akio Nakashima, Rachel Ε. Neale, Hai Pham, Christine Rake, Judy R. Rees, Jenni Rosendahl, Robert Scragg, Dheeraj Shah, Yoshiki Shimizu, Steve Simpson-Yap, Geeta Trilok‐Kumar, Mitsuyoshi Urashima, Adrian R. Martineau