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Authors
Liu, Zhaoqun
Wang, Lingling
Zhou, Zhi
Sun, Ying
Wang, Mengqiang
Wang, Hao
Hou, Zhanhui
Gao, Dahai
Gao, Qiang
Song, Linsheng
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Article History
Received: 4 September 2015
Accepted: 29 April 2016
First Online: 19 May 2016
Competing interests
: The authors declare no competing financial interests.
