American Journal of Respiratory and Critical Care Medicine · 2012 · 135 citations · 18 references
In children with asthma treated with inhaled corticosteroids, vitamin D deficiency is associated with poorer lung function than in children with vitamin D insufficiency or sufficiency.
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National surveillance for asthma--United States, 1980-2004.
Jeanne E. Moorman, Rose A. Rudd, Carol Johnson et al. · PubMed · 2007 · 1.4K citations
Prevalence and Associations of 25-Hydroxyvitamin D Deficiency in US Children: NHANES 2001–2004
Juhi Kumar, Paul Muntner, Frederick J. Kaskel et al. · PEDIATRICS · 2009 · 615 citations · Full text