Chen, Guangxiang
Hu, Xinyu
Li, Lei
Huang, Xiaoqi
Lui, Su
Kuang, Weihong
Ai, Hua
Bi, Feng
Gu, Zhongwei
Gong, Qiyong
Article History
Received: 27 September 2015
Accepted: 1 February 2016
First Online: 24 February 2016
Competing interests
: The authors declare no competing financial interests.