Liu, Yating http://orcid.org/0000-0001-5349-3169
Shen, Wen http://orcid.org/0000-0002-8473-5092
Li, Qi http://orcid.org/0000-0003-2748-6760
Shu, Jiangnan
Gao, Lingfeng http://orcid.org/0000-0003-3706-4203
Ma, Mingming http://orcid.org/0000-0002-7967-8927
Wang, Wei
Cui, Hua http://orcid.org/0000-0003-4769-9464
Article History
Received: 1 April 2017
Accepted: 15 August 2017
First Online: 17 October 2017
Competing interests
: The authors declare no competing financial interests.