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Authors
Su, Zhen
Li, Lixiang
Peng, Haipeng
Kurths, Jürgen
Xiao, Jinghua
Yang, Yixian
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Article History
Received: 19 November 2013
Accepted: 2 June 2014
First Online: 24 June 2014
Competing interests
: The authors declare no competing financial interests.
