Funding for this research was provided by:
Guangdong Science and Technology Department (2016A020226051)
Article History
Received: 25 May 2018
Accepted: 25 October 2018
First Online: 13 November 2018
Compliance with ethical standards
:
: We declare that we have no conflict of interest with other people or organizations that can inappropriately influence our work; there is no professional or other personal interest of any nature or kind in any product, service or company that could be construed as influencing the position presented in. We have full control of all primary data and we agree to allow the journal to review our data if requested.