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Authors
Yu, Chengshu
Wang, Shuo
Meng, Xuemei
Li, Weiqin
Deng, Yanmei
Li, Nan
Xu, Zhongxian
Wang, Leishen
Zhao, Ming
Leng, Junhong
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Article History
Received: 25 December 2018
Accepted: 9 May 2019
First Online: 8 July 2019
Compliance with ethical standards
:
: None.
: The study was approved by the Ethics Committee of Tianjin Women’s and Children’s Health Center, and written informed consent was provided by all participants.
