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Authors
Yuan, Xianshun
Cui, Xiao
Gu, Hui
Wang, Mo
Dong, Yin
Cai, Shifeng
Feng, Xiang
Wang, Ximing
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (81371548, 81571672, 81901740)
Taishan Scholar Projection
Health Care and Family Planning Technology Development Plans of Shandong Province (2013WS0108)
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Article History
Received: 29 December 2019
Accepted: 15 February 2020
First Online: 20 February 2020
Compliance with ethical standards
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: The authors declare that they have no conflicts of interest.
: This retrospective study was approved by institutional review board.
: Written informed consent was obtained from the patients or their designated proxy.
