Wang, Bingwu
Lewis, Ramsey S.
Shi, Junli
Song, Zhongbang
Gao, Yulong
Li, Wenzheng
Chen, Hongxia
Qu, Rongda
Article History
Received: 22 September 2015
Accepted: 28 October 2015
First Online: 2 December 2015
Competing interests
: The authors declare no competing financial interests.