Guo, Y
Zynat, J
Xu, Z
Wang, X
Osiman, R
Zhao, H
Tuhuti, A
Abdunaimu, M
Wang, H
Jin, X
Xing, S
Article History
Received: 17 August 2015
Revised: 4 April 2016
Accepted: 12 April 2016
First Online: 18 May 2016
Competing interests
: The authors declare no conflict of interest.