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Authors
Wang, Tong-Hong
Chen, Tse-Ching
Teng, Xiao
Liang, Kung-Hao
Yeh, Chau-Ting
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Article History
Received: 18 February 2015
Accepted: 8 June 2015
First Online: 11 August 2015
Competing interests
: The authors declare no competing financial interests.
