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Authors
Liu, X.
Xu, D.
Liu, Z.
Li, Y.
Zhang, C.
Gong, Y.
Jiang, Y.
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (81802305)
Beijing Municipal Natural Science Foundation (7192035)
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Article History
Received: 21 October 2019
Accepted: 21 January 2020
First Online: 12 February 2020
Compliance with ethical standards
:
: The authors report no conflicts of interest in this work.
: The authors declared that the research was conducted according to the principles of the World Medical Association Declaration of Helsinki “Ethical Principles for Medical Research Involving Human Subjects” (amended in October 2013).
: Informed consent was obtained from all individual participants included in the study.
