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Authors
Liu, Rui
Zhang, Ping
Su, Yiqi
Lin, Huixing
Zhang, Hui
Yu, Lei
Ma, Zhe
Fan, Hongjie
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Article History
Received: 26 October 2015
Accepted: 13 May 2016
First Online: 3 June 2016
Competing interests
: The authors declare no competing financial interests.
