Wang, Hongrui
Meng, Yake
Cui, Quanjun
Qin, Fujun
Yang, Haisong
Chen, Yu
Cheng, Yajun
Shi, Jiangang
Guo, Yongfei
Article History
Received: 3 March 2016
Accepted: 24 October 2016
First Online: 15 November 2016
Competing interests
: The authors declare no competing financial interests.