Xu, Yang
Miotkowski, Ireneusz
Liu, Chang
Tian, Jifa
Nam, Hyoungdo
Alidoust, Nasser
Hu, Jiuning
Shih, Chih-Kang
Hasan, M. Zahid
Chen, Yong P.
Article History
Received: 15 June 2014
Accepted: 23 September 2014
First Online: 10 November 2014
Competing interests
: The authors declare no competing financial interests.