Liao, Yuning
Liu, Ningning
Hua, Xianliang
Cai, Jianyu
Xia, Xiaohong
Wang, Xuejun
Huang, Hongbiao
Liu, Jinbao
Article History
Received: 7 August 2016
Revised: 7 November 2016
Accepted: 9 November 2016
First Online: 2 February 2017
Competing interests
: The authors declare no conflict of interest.