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Authors
Ren, J
Chen, Y I
Liu, C H
Chen, P-C
Prentice, H
Wu, J-Y
Liu, P K
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Article History
Received: 24 March 2015
Revised: 17 June 2015
Accepted: 8 July 2015
First Online: 24 July 2015
Competing interests
: The authors declare no conflict of interest.
