Sun, Yuan
Zhang, Ting
Chen, Jingchang
Funding for this research was provided by:
Guangdong Provincial Scientific Technological Research Fund (2014A020209031)
Article History
Received: 20 September 2017
Revised: 23 December 2017
Accepted: 16 January 2018
First Online: 24 January 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: For this type of study formal consent is not required.
: This article does not contain any studies with human participants performed by any of the authors.