Gao, Shijuan http://orcid.org/0000-0001-8890-2508
Li, Jiandong
Song, Liping
Wu, Jiaoxiang
Huang, Wenlin http://orcid.org/0000-0002-2277-730X
Article History
Received: 22 April 2017
Accepted: 21 June 2017
First Online: 30 June 2017
Compliance with Ethics Guidelines
: The authors declare that they have no conflict of interest. This article does not contain any studies with human or animal subjects performed by any of the authors.