Wang, Haibin
Wang, Jingjing
Jiang, Jiafu
Chen, Sumei
Guan, Zhiyong
Liao, Yuan
Chen, Fadi
Article History
Received: 14 July 2014
Accepted: 7 October 2014
First Online: 27 October 2014
Competing interests
: The authors declare no competing financial interests.