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Authors
Dong, Chengyan
Yang, Sujuan
Shi, Jiyun
Zhao, Huiyun
Zhong, Lijun
Liu, Zhaofei
Jia, Bing
Wang, Fan
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Article History
Received: 30 April 2015
Accepted: 30 November 2015
First Online: 6 January 2016
Competing interests
: The authors declare no competing financial interests.
