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Authors
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (81670123, 81670144)
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Article History
Received: 4 March 2020
Accepted: 23 May 2020
First Online: 2 June 2020
Compliance with ethical standards
:
: The authors have no conflict of interest to declare.
: All procedures performed were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Not applicable.
