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Authors
Zhang, Shuo
Tang, Mi-bo
Luo, Hai-yang
Shi, Chang-he
Xu, Yu-ming
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Article History
Received: 2 March 2017
Revised: 13 May 2017
Accepted: 17 May 2017
First Online: 29 June 2017
Competing interests
: The authors declare no conflict of interest.
