Wu, Haibo
Peng, Xiuming
Peng, Xiaorong
Cheng, Linfang
Lu, Xiangyun
Jin, Changzhong
Xie, Tiansheng
Yao, Hangping
Wu, Nanping
Article History
Received: 26 June 2015
Accepted: 30 October 2015
First Online: 2 December 2015
Competing interests
: The authors declare no competing financial interests.