Low concentrations of serum 25-hydroxyvitamin D associated with increased risk for chronic bronchitis among US adults
Publisher: Cambridge University Press
E-ISSN: 1475-2662|107|9|1386-1392
ISSN: 0007-1145
Source: British Journal of Nutrition, Vol.107, Iss.9, 2012-05, pp. : 1386-1392
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Abstract