Su, Xianli
Fu, Fan
Yan, Yonggao
Zheng, Gang
Liang, Tao
Zhang, Qiang
Cheng, Xin
Yang, Dongwang
Chi, Hang
Tang, Xinfeng
Zhang, Qingjie
Uher, Ctirad
Article History
Received: 20 February 2014
Accepted: 4 August 2014
First Online: 16 September 2014
Competing interests
: The authors declare no competing financial interests.