Funding for this research was provided by:
National Natural Science Foundation of China (11675001, 11875135)
Natural Science Basic Research Plan in Shaanxi Province of China (2019JM045)
Quanzhou City Science & Technology Program of China (2018C085R)
Natural Science Basic Research Plan in Shaanxi Province of China (2018JM6099)
Scientific Research Funds of Huaqiao University (15BS401)
Article History
Received: 17 June 2019
Accepted: 8 November 2019
First Online: 20 November 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.