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Authors
Chien, J-Y
Tsen, S-D
Chien, C-C
Liu, H-W
Tung, C-Y
Lin, C-H
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Article History
Received: 10 December 2015
Revised: 4 January 2016
Accepted: 6 January 2016
First Online: 15 February 2016
Competing interests
: The authors declare no conflict of interest.
