中国当代医药
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中国当代医药  2017, Vol. 24 Issue (3): 74-76    DOI:
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Levels of serum vitamin A in children with recurrent respiratory tract infection and its impact on immune function
LIN Feng-ji
Maternal and Child Health Hospital of Longgang District in Shenzhen City,Guangdong Province,Shenzhen518172,China
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