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Authors
Yeung, Hing-Yuen
Lo, Pui-Chi
Ng, Dennis K.P.
Fong, Wing-Ping
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Article History
Received: 24 February 2015
Revised: 15 July 2015
Accepted: 10 August 2015
First Online: 21 September 2015
Competing interests
: The authors declare no conflicts of interest.
