Li, Ying http://orcid.org/0000-0001-8694-5854
Qian, Zhenyu http://orcid.org/0000-0002-3921-3818
Ma, Li
Hu, Shuxin
Nong, Daguan
Xu, Chunhua
Ye, Fangfu
Lu, Ying http://orcid.org/0000-0002-8421-7228
Wei, Guanghong
Li, Ming
Article History
Received: 19 January 2016
Accepted: 16 August 2016
First Online: 30 September 2016
Competing interests
: The authors declare no competing financial interests.