Hang, Ruiqiang
Liu, Yanlian
Zhao, Lingzhou
Gao, Ang
Bai, Long
Huang, Xiaobo
Zhang, Xiangyu
Tang, Bin
Chu, Paul K.
Article History
Received: 2 July 2014
Accepted: 1 December 2014
First Online: 18 December 2014
Competing interests
: The authors declare no competing financial interests.