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Authors
Wang, Xiaoli
Li, Han
Fu, Guolong
Wang, Yunfu
Du, Shiming
Yu, Long
Wei, Youheng
Chen, Shi
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Article History
Received: 8 October 2015
Accepted: 19 February 2016
First Online: 10 March 2016
Competing interests
: The authors declare no competing financial interests.
