Wang, Haoyu
Lai, Yaxin
Han, Cheng
Liu, Aihua
Fan, Chenling
Wang, Hong
Zhang, Hongmei
Ding, Shuangning
Teng, Weiping
Shan, Zhongyan
Article History
Received: 22 February 2016
Accepted: 31 May 2016
First Online: 27 June 2016
Competing interests
: The authors declare no competing financial interests.