Wu, Jianfeng
Moser, Herbert O.
Li, Rujiang
Yang, Yihao
Jing, Liqiao
Chen, Hongsheng
Breese, Mark B. H.
Article History
Received: 5 October 2016
Accepted: 29 December 2016
First Online: 2 February 2017
Competing interests
: The authors declare no competing financial interests.