?:authorAffiliation
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[\'Vanke School of Public Health, Tsinghua University, Beijing, 100091, China.\', \'School of Public Health, Peking University, Beijing, 100191, China.\', \'School of Public Health, XiangNan University, Chenzhou, 423000, China.\', \'Jiangxi Maternal and Child Health Hospital, Nanchang, 330006, China.\', \'Shenyang Maternal and Child Health Hospital, Shenyang, 110000, China.\', \'Vanke School of Public Health, Tsinghua University, Beijing, 100091, China. aizhao18@tsinghua.edu.cn.\']
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