Xu, Jin-Shi
Sun, Kai http://orcid.org/0000-0003-3018-7219
Han, Yong-Jian
Li, Chuan-Feng
Pachos, Jiannis K.
Guo, Guang-Can
Article History
Received: 1 November 2015
Accepted: 12 September 2016
First Online: 25 October 2016
Competing interests
: The authors declare no competing financial interests.