Journal of Hebei Medical University ›› 2022, Vol. 43 ›› Issue (5): 560-563,569.doi: 10.3969/j.issn.1007-3205.2022.05.012
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1.The Second Clinical School of Xuzhou Medical University, Jiangsu Province, Xuzhou 221000, China;
2.Department of Postpartum Health, Huai'an Maternity and Child Health Hospital, Jiangsu Province, Huai′an 223001, China