Jiang, Rongzhen
Teng, Yincheng
Huang, Yajuan
Gu, Jinghong
Ma, Li
Li, Ming
Zhou, Yuedi
Article History
Received: 15 April 2014
Revised: 28 July 2014
Accepted: 31 July 2014
First Online: 26 September 2014
Competing interests
: The authors declare no conflicts of interest.