Funding for this research was provided by:
Xiamen Science and Technology Program Grant (3502Z20174025)
Fujian Health-Education Research Grant (WKJ2016-2-03)
Fujian Provincial Natural Science Foundation (2015J01416)
Article History
Received: 24 June 2018
Revised: 12 August 2018
Accepted: 27 August 2018
First Online: 30 August 2018