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Authors
Huang, S.-W.
Yang, J.
Lim, J.
Zhou, H.
Yu, M.
Kwong, D.-L.
Wong, C. W.
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Article History
Received: 18 March 2015
Accepted: 23 July 2015
First Online: 27 August 2015
Competing interests
: The authors declare no competing financial interests.
