Wang, Lulu
Al-Mamun, Mohammad
Liu, Porun
Wang, Yun http://orcid.org/0000-0001-8619-0455
Yang, Hua Gui
Wang, Hai Feng
Zhao, Huijun
Article History
Received: 23 May 2015
Revised: 11 July 2015
Accepted: 22 July 2015
First Online: 20 November 2015
Competing interests
: The authors declare no conflict of interest.