Qu, Yanhua
Tian, Shilin
Han, Naijian
Zhao, Hongwei
Gao, Bin
Fu, Jun
Cheng, Yalin
Song, Gang
Ericson, Per G. P.
Zhang, Yong E.
Wang, Dawei
Quan, Qing
Jiang, Zhi
Li, Ruiqiang
Lei, Fumin
Article History
Received: 29 May 2015
Accepted: 21 August 2015
First Online: 25 September 2015
Competing interests
: The authors declare no competing financial interests.