Lu, Taiping
Ma, Ziguang
Du, Chunhua
Fang, Yutao
Wu, Haiyan
Jiang, Yang
Wang, Lu
Dai, Longgui
Jia, Haiqiang
Liu, Wuming
Chen, Hong
Article History
Received: 4 April 2014
Accepted: 22 July 2014
First Online: 20 August 2014
Competing interests
: The authors declare no competing financial interests.