?:authorAffiliation
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[\'Department of Preventive Medicine, Chang Zhi Medical College, Changzhi 046000, China; NHC Key Laboratory of Health Economics and Policy Reserch (Shandong Univercity), Jinan 250012, China. Electronic address: wjcao16@czmc.edu.cn.\', \'Department of Preventive Medicine, Chang Zhi Medical College, Changzhi 046000, China.\', \'Department of Neonatology, Changzhi Maternal and Child Care Hospital, Changzhi 046000, China.\', \'Department of Preventive Medicine, Chang Zhi Medical College, Changzhi 046000, China. Electronic address: zhengjj@czmc.edu.cn.\']
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