Guo, Xiaogang
Wang, Xueju
Ou, Dapeng
Ye, Jilong
Pang, Wenbo
Huang, Yonggang
Rogers, John A.
Zhang, Yihui
Article History
Received: 15 February 2018
Revised: 5 April 2018
Accepted: 9 April 2018
First Online: 14 May 2018
Competing interests
: The authors declare no competing interests.