Ding, Junjun
Zhang, Yuguang
Deng, Ye
Cong, Jing
Lu, Hui
Sun, Xin
Yang, Caiyun
Yuan, Tong
Van Nostrand, Joy D.
Li, Diqiang
Zhou, Jizhong
Yang, Yunfeng
Article History
Received: 9 July 2014
Accepted: 29 December 2014
First Online: 23 January 2015
Competing interests
: The authors declare no competing financial interests.