Chen, Kuangcai http://orcid.org/0000-0002-9321-9225
Gu, Yan
Sun, Wei
Bin Dong,
Wang, Gufeng http://orcid.org/0000-0001-5068-4883
Fan, Xinxin
Xia, Tian
Fang, Ning http://orcid.org/0000-0003-4710-0984
Article History
Received: 22 February 2017
Accepted: 9 August 2017
First Online: 12 October 2017
Competing interests
: The authors declare no competing financial interests.