Zhu, Jinlong
Yang, Liuxiang
Wang, Hsiu-Wen
Zhang, Jianzhong
Yang, Wenge
Hong, Xinguo
Jin, Changqing
Zhao, Yusheng
Article History
Received: 11 June 2015
Accepted: 9 November 2015
First Online: 16 December 2015
Competing interests
: The authors declare no competing financial interests.