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Vitamin D deficiency (VDD) and vitamin D insufficiency (VDI) are highly prevalent in the world, but the vitamin D status of children in northeast China is seldom investigated. The aim of this study was to clarify the prevalence of VDD and VDI among children in the First Affiliated Hospital of Harbin Medical University in Heilongjiang province in China.

Serum vitamin D levels among children aged 0–12 years in the First Affiliated Hospital of Harbin Medical University, China