A randomized controlled trial of vitamin D3 supplementation for the prevention of symptomatic upper respiratory tract infections.
Li-Ng M, Aloia JF, Pollack S, Cunha BA, Mikhail M, Yeh J, Berbari N.
Epidemiol Infect. 2009 Mar 19:1-9. [Epub ahead of print]
PMID: 19296870