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Authors
Xu, Jian https://orcid.org/0000-0002-3521-6843
Fang, Hongbin https://orcid.org/0000-0001-6691-0531
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (11772229, 91748203)
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Article History
Received: 8 January 2019
Accepted: 24 April 2019
First Online: 3 May 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interests.
