Xiong, Hanqing
Zhou, Zhenqiao
Zhu, Mingqiang
Lv, Xiaohua
Li, Anan
Li, Shiwei
Li, Longhui
Yang, Tao
Wang, Siming
Yang, Zhongqin
Xu, Tonghui
Luo, Qingming
Gong, Hui
Zeng, Shaoqun
Article History
Received: 21 August 2013
Accepted: 29 April 2014
First Online: 2 June 2014
Competing interests
: The authors declare no competing financial interests.