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Authors
Xue, Zhike
Yan, Xiaoli
Cheng, Xin http://orcid.org/0000-0003-2837-7136
Yang, Liheng
Su, Yingna
Kliem, Bernhard
Zhang, Jun
Liu, Zhong
Bi, Yi
Xiang, Yongyuan
Yang, Kai
Zhao, Li
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Article History
Received: 3 June 2015
Accepted: 5 May 2016
First Online: 16 June 2016
Competing interests
: The authors declare no competing financial interests.
