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Authors
Zhu, Haiyan
Li, Yawei
Zhu, Guizhi
Su, Haibin
Chan, Siew Hwa
Sun, Qiang
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Article History
Received: 7 September 2016
Accepted: 7 December 2016
First Online: 18 January 2017
Competing interests
: The authors declare no competing financial interests.
