Li, Jing
Hou, Youmin
Liu, Yahua http://orcid.org/0000-0003-4671-698X
Hao, Chonglei
Li, Minfei
Chaudhury, Manoj K.
Yao, Shuhuai
Wang, Zuankai
Article History
Received: 31 May 2015
Accepted: 18 December 2015
First Online: 1 February 2016
Competing interests
: The authors declare no competing financial interests.