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Authors
Kong, Tiantian
Li, Jingmei
Liu, Zhou
Zhou, Zhuolong
Ng, Peter Hon Yu
Wang, Liqiu
Shum, Ho Cheung
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Article History
Received: 25 August 2015
Accepted: 14 December 2015
First Online: 10 February 2016
Competing interests
: The authors declare no competing financial interests.
