
Levels of serum vitamin D and trace elements in 421 pregnant women in early and middle trimester of pregnancy
ZHANG Wen-wen, WANG Zhi-xu
Chinese Journal of School Doctor ›› 2020, Vol. 34 ›› Issue (3) : 170-171,240.
Levels of serum vitamin D and trace elements in 421 pregnant women in early and middle trimester of pregnancy
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