Wang, Meihong
Luo, Lan
Yao, Lili
Wang, Caiping
Jiang, Ketao
Liu, Xiaoyu
Xu, Muchen
Shen, Ningmei
Guo, Shaodong
Sun, Cheng
Yang, Yumin
Article History
Received: 4 December 2015
Accepted: 14 April 2016
First Online: 5 May 2016
Competing interests
: The authors declare no competing financial interests.