中国计划生育学杂志
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山西省3490例孕产妇孕期保健服务利用情况调查
山西省妇幼保健院(太原,030013)
Investigation of the situation of the utilization of maternal health care services in 3490 women in Shanxi province
Shanxi Maternal and Child Health Care Hospital,Taiyaun,Shanxi Province,030013