?:authorAffiliation
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[\'Obstetric Department, Maternal and Child Health Hospital of Hubei Province, Huazhong University of Science and Technology, Wuluo Road No.745, Hongshan District, Wuhan, 430070, China.\', \'Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road No.13, Qiaokou District, Wuhan, 430030, China.\', \'Obstetric Department, Maternal and Child Health Hospital of Hubei Province, Huazhong University of Science and Technology, Wuluo Road No.745, Hongshan District, Wuhan, 430070, China. chengyao2014@sina.com.\']
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