Validity and reproducibility of a semi-quantitative food-frequency questionnaire for estimating calcium intake in Belgian preschool children
Publisher： Cambridge University Press
E-ISSN： 1475-2662|95|4|802-816
ISSN： 0007-1145
Source： British Journal of Nutrition, Vol.95, Iss.4, 2006-04, pp. : 802-816
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