Wang, Luxian
Peng, Huiling
Wang, Xiaolin
Chen, Xiang
Yang, Chunsheng
Yang, Bin
Liu, Jingquan
Article History
Received: 16 March 2016
Revised: 22 July 2016
Accepted: 21 August 2016
First Online: 19 December 2016
Competing interests
: The authors declare no conflict of interest.