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Authors
Li, Yanru
Xu, Jing
Liu, Zeying
Yu, Hai
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Funding
Funding for this research was provided by:
the Key Scientific Research Projects in 2017 at North Minzu University (2017KJ19)
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Article History
Received: 6 March 2019
Accepted: 16 May 2019
First Online: 20 May 2019
Compliance with ethical standards
:
: There are no conflicts to declare.
