Liu, Yan-gang
Chen, Ji-kuai
Zhang, Zi-teng
Ma, Xiu-juan
Chen, Yong-chun
Du, Xiu-ming
Liu, Hong
Zong, Ying
Lu, Guo-cai
Article History
Received: 12 September 2016
Revised: 24 November 2016
Accepted: 5 December 2016
First Online: 2 February 2017
Competing interests
: The authors declare no conflict of interests.