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Authors
Peng, Qing
Ji, Wei
Lian, Jie
Chen, Xiao-Jia
Huang, Hanchen
Gao, Fei
De, Suvranu
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Article History
Received: 2 April 2014
Accepted: 18 June 2014
First Online: 18 July 2014
Competing interests
: The authors declare no competing financial interests.
