Wang, Peipei
Liao, Hong
Zhang, Wengen
Yu, Xianxian
Zhang, Rui
Shan, Hongyan
Duan, Xiaoshan
Yao, Xu
Kong, Hongzhi http://orcid.org/0000-0002-0034-0510
Article History
Received: 14 September 2015
Accepted: 29 October 2015
First Online: 7 December 2015
Competing interests
: The authors declare no competing financial interests.