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Authors
Li, Yu-Chun
Wang, Hua-Wei
Tian, Jiao-Yang
Liu, Li-Na
Yang, Li-Qin
Zhu, Chun-Ling
Wu, Shi-Fang
Kong, Qing-Peng
Zhang, Ya-Ping
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Article History
Received: 27 October 2014
Accepted: 27 February 2015
First Online: 26 March 2015
Competing interests
: The authors declare no competing financial interests.
