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Authors
Wang, Qi
Qiao, Yuqin
Cheng, Mengqi
Jiang, Guofeng
He, Guo
Chen, Yunsu
Zhang, Xianlong
Liu, Xuanyong
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Article History
Received: 27 January 2016
Accepted: 29 April 2016
First Online: 17 May 2016
Competing interests
: The authors declare no competing financial interests.
