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Authors
Gao, Qingguo
Zhang, Zhenfeng
Xu, Xiaole
Song, Jian
Li, Xuefei
Wu, Yanqing http://orcid.org/0000-0003-2578-5214
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Article History
Received: 27 March 2018
Accepted: 15 October 2018
First Online: 14 November 2018
Competing interests
: The authors declare no competing interests.
