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Authors
Liu, Mengfei
He, Zhonghu
Zhang, Chanyuan
Liu, Fangfang
Liu, Ying
Li, Jingjing
Xu, Zhongyao
Wang, Qiyan
Hang, Dong
Shen, Na
Pan, Yaqi
Guo, Chuanhai
Cai, Hong
Ke, Yang
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Article History
Received: 14 January 2015
Accepted: 23 March 2015
First Online: 23 July 2015
Competing interests
: The authors declare no competing financial interests.
