Fan, L-C
Shiau, C-W
Tai, W-T
Hung, M-H
Chu, P-Y
Hsieh, F-S
Lin, H
Yu, H-C
Chen, K-F
Article History
Received: 28 July 2014
Revised: 24 November 2014
Accepted: 5 December 2014
First Online: 26 January 2015
Competing interests
: The authors declare no conflict of interest.