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Authors
Kong, Ling-Bao
Huang, Cheng-Ping
Du, Chao-Hai
Liu, Pu-Kun
Yin, Xiao-Gang
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Article History
Received: 30 October 2014
Accepted: 3 February 2015
First Online: 5 March 2015
Competing interests
: The authors declare no competing financial interests.
