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Authors
Niu, Ningning
Xiang, Jian-Feng
Yang, Qin
Wang, Lijun
Wei, Zhanying
Chen, Ling-Ling http://orcid.org/0000-0001-9501-0305
Yang, Li
Zou, Weiguo
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Article History
Received: 30 August 2016
Accepted: 5 December 2016
First Online: 24 January 2017
Competing interests
: The authors declare no conflict of interest.
