Gu, Lin
Xu, Limei
Zhang, Qingsheng
Pan, Deng
Chen, Na
Louzguine-Luzgin, Dmitri V.
Yao, Ke-Fu
Wang, Weihua
Ikuhara, Yuichi
Article History
Received: 30 November 2014
Accepted: 18 February 2015
First Online: 16 March 2015
Competing interests
: The authors declare no competing financial interests.