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Chinese
Association of Serum 25（OH）D Concentration with Children's Immune Function and Recurrent Respiratory Infection
ZHANG Qi，DENG Fang，BI Liangxue，XU Fengqin，XU Chongyu
Chinese General Practice . 2020, (
9
): 1112 -1116 . DOI: 10.12114/j.issn.1007-9572.2019.00.626
