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Authors
Wang, Ning https://orcid.org/0000-0002-4453-8588
Zhang, Guoshan https://orcid.org/0000-0003-0994-5468
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (61473202)
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Article History
Received: 21 December 2018
Accepted: 13 June 2019
First Online: 20 June 2019
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
