Liu, Yi
Peng, Zicheng
Zhou, Renjun
Song, Shaohua
Liu, Weiguo
You, Chen-Feng
Lin, Yen-Po
Yu, Kefu
Wu, Chung-Che
Wei, Gangjian
Xie, Luhua
Burr, George S.
Shen, Chuan-Chou
Article History
Received: 2 October 2013
Accepted: 7 May 2014
First Online: 3 June 2014
Competing interests
: The authors declare no competing financial interests.