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Authors
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Funding
Funding for this research was provided by:
the Natural Science Foundation of Jiangsu Province (BK20130314)
the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Article History
Received: 21 June 2019
Accepted: 31 August 2019
First Online: 4 September 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
Free to read: This content has been made available to all.
