Chen, Zhiyang
Yi, Weiwei
Morita, Yohei
Wang, Hu
Cong, Yusheng
Liu, Jun-Ping
Xiao, Zhicheng
Rudolph, K. Lenhard
Cheng, Tao
Ju, Zhenyu
Article History
Received: 7 August 2014
Accepted: 27 February 2015
First Online: 16 April 2015
Competing interests
: The authors declare no competing financial interests.