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Authors
Sun, Guoqiang
Lin, Ying
Lu, Honglian
He, Wenjing
Li, Ruyan
Yang, Lijun
Liu, Xian
Wang, Hongyan
Yang, Xuewen
Cheng, Yao
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Article History
Received: 8 July 2020
Accepted: 5 November 2020
First Online: 23 November 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Maternal and Child Health Hospital of Hubei Province and this study was based on the retrospective clinical data without any individual patient identifiers.
: Not applicable.
: The authors declare no potential conflict of interests.
