Li, Guohua
Gan, Yu
Fan, Yingchao
Wu, Yufeng
Lin, Hechun
Song, Yanfang
Cai, Xiaojin
Yu, Xiang
Pan, Weihong
Yao, Ming
Gu, Jianren
Tu, Hong
Article History
Received: 8 September 2014
Accepted: 17 December 2014
First Online: 19 January 2015
Competing interests
: The authors declare no competing financial interests.