Funding for this research was provided by:
National Natural Science Foundation of China (No. U1637601)
National Natural Science Foundation of China (No. 51575539)
National Natural Science Foundation of China (No. 51805549)
Hunan Provincial Science and Technology Department (No. 2016GK1004)
Article History
Received: 19 August 2019
Accepted: 16 October 2019
First Online: 1 November 2019