Qi, Rongfeng
Zhang, Long Jiang
Chen, Hui Juan
Zhong, Jianhui
Luo, Song
Ke, Jun
Xu, Qiang
Kong, Xiang
Liu, Chang
Lu, Guang Ming
Article History
Received: 8 April 2015
Accepted: 27 July 2015
First Online: 2 September 2015
Competing interests
: The authors declare no competing financial interests.