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Authors
Chen, Wei
Li, Jiaoyuan
Liu, Cheng
Chen, Xueqin
Zhu, Ying
Yang, Yang
Gong, Yajie
Wang, Tengfei
Miao, Xiaoping
Nie, Xiu
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Article History
Received: 13 May 2014
Accepted: 27 August 2014
First Online: 15 September 2014
Competing interests
: The authors declare no competing financial interests.
