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Authors
Zhang, Guowei
Cheng, Ruirui
Zhang, Zengli
Jiang, Tao
Ren, Shengxiang
Ma, Zhiyong
Zhao, Sha
Zhou, Caicun
Zhang, Jun
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Article History
Received: 2 November 2016
Accepted: 17 January 2017
First Online: 17 February 2017
Competing interests
: The authors declare no competing financial interests.
