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Authors
Zhao, Fenghua
Sun, Yijie
Zhang, Yue
Xu, Tao
Wang, Nianrong
Yan, Shuangqin
Zeng, Ting
Zhang, Fenghua
Gao, Jie
Yue, Qing
Rozelle, Scott
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Article History
Received: 28 October 2022
Accepted: 27 February 2023
First Online: 7 March 2023
Declarations
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: This study protocol was approved by the Ethical Review Board of National Center for Women and Children Health, China Center for Disease Control and Prevention [FY2018-29 and FY2017-18]. All study procedures and methods were performed in accordance with the relevant regulations and guidelines. And written informed consent was obtained from each participant parent before survey.
: Not Applicable.
: Not Applicable.
