Qiu, Qiang
Wang, Lizhong
Wang, Kun
Yang, Yongzhi
Ma, Tao
Wang, Zefu
Zhang, Xiao
Ni, Zhengqiang
Hou, Fujiang
Long, Ruijun
Abbott, Richard
Lenstra, Johannes
Liu, Jianquan
Article History
Received: 27 July 2015
Accepted: 25 November 2015
First Online: 22 December 2015
Competing interests
: The authors declare no competing financial interests.