He, Jing
Liao, Xiao-Yu
Zhu, Jin-Hong
Xue, Wen-Qiong
Shen, Guo-Ping
Huang, Shao-Yi
Chen, Wei
Jia, Wei-Hua
Article History
Received: 11 March 2014
Accepted: 7 July 2014
First Online: 22 August 2014
Competing interests
: The authors declare no competing financial interests.