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Authors
Ma, Ying
Pei, Yan
Yin, Chenghong
Jiang, Yuxin
Wang, Jingjing
Li, Xiaofei
Li, Lin https://orcid.org/0000-0002-3597-3350
Kagan, Karl Oliver
Wu, Qingqing
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Funding
Funding for this research was provided by:
National Key Research and Development Program of China (2016YFC1000104)
National Key Research and Development Program of China (2016YFC1000101)
Beijing Municipal Administration of Hospitals’ Ascent Plan (DFL20151302)
National Science and Technology Infrastructure Program (2014BAI06B05)
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Article History
Received: 9 January 2019
Accepted: 27 June 2019
First Online: 4 July 2019
Compliance with ethical standards
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: The authors declare that they have no conflict of interest.
: This study was approved by the Ethics Committee of Beijing Obstetrics and Gynecology Hospital and was in accordance with the 1964 Helsinki Declaration and its later amendments.
: Each participant in this study signed an informed consent form.
