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Authors
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Funding
Funding for this research was provided by:
Education Department of Jiangxi Province (GJJ160036, GJJ180007, GJJ180031)
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Article History
Received: 18 June 2019
Accepted: 21 August 2019
First Online: 24 August 2019
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
