Xu, Cancan
Huang, Yihui
Yepez, Gerardo
Wei, Zi
Liu, Fuqiang
Bugarin, Alejandro
Tang, Liping
Hong, Yi
Article History
Received: 21 June 2016
Accepted: 14 September 2016
First Online: 30 September 2016
Competing interests
: The authors declare no competing financial interests.