Funding for this research was provided by:
Natural Science Foundation of Hainan Province of China (317043)
Natural Science Foundation of China (31760518)
National Key Technology Research and Development Program of the Ministry of Science and Technology of China (2015BAD08B03)
The Research Start-up Foundation of Hainan University (kyqd1655)
Hainan University-Tianjin University Independent Innovation Fund Cooperation Project (HDTDU201705)
Article History
Received: 18 August 2018
Accepted: 21 September 2018
First Online: 14 November 2018
Compliance with Ethical Standards
:
: The authors declare that they have no competing interests.