?:authorAffiliation
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[\'Department of Obstetrics, The Center Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430000, People\'s Republic of China.\', \'Department of Obstetrics and Gynecology, The First People\'s Hospital of Datong, 336 Hengan Avenue, Datong, 037000, People\'s Republic of China. baijunjinanu@163.com.\']
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