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Authors
Guan, Siao-Syun
Sheu, Meei-Ling
Wu, Cheng-Tien
Chiang, Chih-Kang
Liu, Shing-Hwa
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Article History
Received: 20 March 2015
Accepted: 3 September 2015
First Online: 9 October 2015
Competing interests
: The authors declare no competing financial interests.
