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Authors
Xiong, Xiaoyan Y. Z.
Jiang, Li Jun
Sha, Wei E. I.
Lo, Yat Hei
Chew, Weng Cho
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Article History
Received: 12 June 2015
Accepted: 30 November 2015
First Online: 7 January 2016
Competing interests
: The authors declare no competing financial interests.
