Zhao, Zi-Hua
Cui, Bing-Yi
Li, Zhi-Hong
Jiang, Fan
Yang, Qian-Qian
Kučerová, Zuzana
Stejskal, Václav
Opit, George
Cao, Yang
Li, Fu-Jun
Article History
Received: 3 November 2015
Accepted: 14 January 2016
First Online: 16 February 2016
Competing interests
: The authors declare no competing financial interests.