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Authors
Du, Bo
Lian, Xiuguo
Cheng, Xiwang
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Funding
Funding for this research was provided by:
NSF of Jiangsu High Education Institutions (17KJB110001)
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Article History
Received: 6 January 2018
Accepted: 20 March 2018
First Online: 4 April 2018
Competing interests
: The authors declare that they have no competing interests.
