Wang, Xianglan
Wang, Hongwei
Liu, Shengxue
Ferjani, Ali
Li, Jiansheng
Yan, Jianbing
Yang, Xiaohong
Qin, Feng
Article History
Received: 5 April 2016
Accepted: 5 July 2016
First Online: 15 August 2016
Competing interests
: The authors declare no competing financial interests.